Most babies who catch COVID recover at home with the same basic supportive care you would give for any respiratory virus: manage fever, keep fluids up, and watch for warning signs. Up to about a third of infected children show no symptoms at all, and when symptoms do appear they tend to be mild, with cough, fever, and sore throat topping the list.1PubMed Central. COVID-19 in Children, Pregnancy and Neonates: A Review of Epidemiologic and Clinical Features That said, babies under one year carry higher risk than older children for needing medical attention, so knowing which symptoms are routine and which demand a call to the pediatrician matters more in this age group than in any other.
What Symptoms to Expect
In young children broadly, the most commonly reported symptoms are cough, fever, and a sore or red throat. Beyond those, you may see nasal congestion, runny nose, wheezing, diarrhea, vomiting, headache, and fatigue.1PubMed Central. COVID-19 in Children, Pregnancy and Neonates: A Review of Epidemiologic and Clinical Features Babies, however, lean more toward gastrointestinal complaints than older kids do. A study focused specifically on infants found that about 70% had high fever above 38.5 °C (roughly 101.3 °F), while about 23% showed labored breathing.2Scientific Reports. COVID-19 infections in infants Fussiness, poor feeding, and loose stools are common but easy to miss as “just a bad day,” so keep COVID on your radar if there is a known exposure in the household.
Neonates, meaning babies in their first 28 days, follow a slightly different pattern. In a systematic review of neonatal cases, about one in four infected newborns had no symptoms at all. Those who did get sick showed the mild respiratory and gastrointestinal signs typical of other newborn infections, and the vast majority breathed fine on room air with a median hospital stay of about 10 days.3Archives of Disease in Childhood. Coronavirus infection in neonates: a systematic review Half of those neonates had picked up the virus from an infected mother, and about a third were brought in from home rather than diagnosed in the hospital, which underscores how easily the virus moves through a household.
When to Call the Doctor or Go to the ER
Most infant COVID cases stay mild, but a small percentage progress to something more serious. Knowing the red flags lets you act quickly if your baby is one of them. A systematic review categorized pediatric COVID into mild, moderate, and severe tiers. The severe category included rapid breathing (70 or more breaths per minute for babies under one year), drops in oxygen levels, loss of consciousness or extreme lethargy, convulsions, signs of dehydration, an inability to eat, and gastrointestinal problems severe enough to suggest organ involvement.4PubMed Central. Clinical Characteristics of COVID-19 Infection in Newborns and Pediatrics: A Systematic Review
In practical terms, here is what to watch for at home:
- Breathing effort: Nostrils flaring with each breath, the skin between or below the ribs pulling inward, or the belly muscles visibly contracting are all signs the baby is working too hard to breathe.5Signa Vitae. Vital signs and work of breathing assessment in the emergency department as predictor for acute respiratory failure in COVID-19 pneumonia
- Color changes: Bluish tint around the lips, tongue, or fingernails suggests low oxygen.
- Dehydration: Fewer than three wet diapers in 24 hours, no tears when crying, a sunken soft spot on the head, or dry lips.
- Lethargy: A baby who is unusually difficult to wake, limp, or completely uninterested in feeding needs to be seen right away.
- Fever in newborns: Any rectal temperature of 100.4 °F (38 °C) or above in a baby younger than three months warrants an immediate call to the pediatrician, COVID or not.
In the infant-specific study mentioned earlier, about 9% of the infants needed supplemental oxygen because their saturation dropped below 94%, one was treated in the ICU, but none required a ventilator and there were no deaths.2Scientific Reports. COVID-19 infections in infants Those numbers are reassuring, but they also show that a meaningful fraction of babies do need medical support. When in doubt, call your pediatrician. Babies deteriorate faster than adults, and a brief phone triage can save precious time.
Home Care Basics
Fever and Pain
For most babies with COVID, the illness plays out over a few days of fever, fussiness, and reduced appetite. Acetaminophen (infant Tylenol) is the go-to fever reducer for babies two months and older. For babies six months and older, ibuprofen is also an option. Early in the pandemic there was concern that ibuprofen might worsen COVID, but the evidence since then has shown that both medications are safe for children with this infection.6PubMed Central. Pain management in COVID-19 pediatric patients-An evidence- based review Dose by weight rather than age, and use the syringe that comes with the product rather than a kitchen spoon. Never give aspirin to a baby or young child.
Non-medication comfort measures help too. A lukewarm sponge bath can bring mild relief. Keep the room at a comfortable temperature, dress the baby in light layers, and offer extra skin-to-skin contact. None of this will shorten the illness, but it will help your baby rest.
Hydration and Feeding
Dehydration is the most common complication parents can actually prevent at home. Babies who are breastfed should nurse more often than usual; those on formula should be offered smaller, more frequent bottles. Official nutrition guidance during the pandemic emphasized keeping up hydration, continuing breastfeeding, and ensuring adequate calorie intake for children recovering at home.7PubMed Central. COVID-19 and Nutrition: Summary of Official Recommendations For babies already eating solids, soft, easy-to-swallow foods and plenty of fluids should be the focus. Oral rehydration solutions designed for infants can help if diarrhea or vomiting is significant, but check with your pediatrician before switching away from breast milk or formula.
Nasal Congestion
Babies are obligate nose breathers for the first several months of life, which means a stuffy nose hits them harder than it hits an older child. Saline drops followed by gentle suction with a bulb syringe or a NoseFrida-style aspirator before feedings and bedtime can make a real difference. Running a cool-mist humidifier in the nursery adds moisture to the air and helps loosen mucus. Avoid medicated nasal sprays and vapor rubs, neither of which is approved for infants.
Testing a Baby for COVID
Rapid antigen tests are convenient, but they are less sensitive in children than the numbers on the box might suggest. A meta-analysis of antigen test performance in the pediatric population found an overall sensitivity of about 66% with very high specificity, meaning a positive result is almost certainly correct, but a negative result misses roughly a third of true infections. In children without symptoms, sensitivity dropped to around 48%.8PubMed Central. Diagnostic accuracy of SARS-CoV-2 antigen test in the pediatric population: A systematic review and meta-analysis Individual studies confirmed this pattern: one evaluation of a widely used rapid test found a sensitivity of about 60% overall, climbing to roughly 71% in children who had symptoms and were tested within five days of onset.9PubMed Central. Diagnostic accuracy of Panbio™ rapid antigen test for SARS-CoV-2 in paediatric population
If your baby has symptoms and the first rapid test comes back negative, test again 24 to 48 hours later. PCR tests remain the gold standard for accuracy, and your pediatrician can order one if a definitive answer matters for care decisions. Getting an accurate swab on a squirming infant is challenging; for home tests, follow the manufacturer’s instructions for a nasal swab and try to swab during a calm moment or while the baby is drowsy.
Which Babies Are at Higher Risk
While most infants handle COVID without incident, certain underlying conditions raise the odds of severe illness. Among hospitalized children under two years of age, the conditions most strongly linked to severe outcomes were chronic lung disease, neurologic disorders, cardiovascular disease, being born premature, and airway abnormalities.10PubMed Central. Risk Factors for Severe COVID-19 in Children A separate meta-analysis covering all pediatric ages confirmed the heightened risk for neonates specifically, finding they faced roughly two and a half times the risk of severe disease compared to older children. That analysis also flagged prematurity, obesity, diabetes, chronic lung disease, heart disease, neurologic conditions, and immunocompromised status.11PubMed Central. Risk Factors for Severe COVID-19 in Children: A Systematic Review and Meta-Analysis
If your baby was born premature, has a heart or lung condition, or has any chronic health problem, have a low threshold for calling the pediatrician when COVID-like symptoms appear. These babies do not necessarily need to go to the ER at the first sniffle, but their care team should know about the illness early so they can advise on monitoring and follow-up.
Breastfeeding and Maternal Antibodies
One of the most reassuring findings from the pandemic is that breastfeeding appears to offer a layer of immune protection for infants. Mothers who recovered from COVID or received vaccination have been shown to pass protective antibodies to their babies through breast milk.12PubMed Central. Breast Milk Conferred Immunity to Infants Against COVID-19 Research has also confirmed that maternal COVID-19 vaccination effectively transfers antibodies both across the placenta during pregnancy and through breastfeeding after birth.13PubMed Central. Neonatal humoral immunity against COVID-19 secondary to transplacental antibody transfer and breastfeeding
The timing of infection or vaccination relative to birth matters. A study measuring antibody transfer found that all breast-milk-fed infants whose mothers were infected before delivery had detectable anti-spike antibodies in their blood, while none of the infants whose mothers were infected only after delivery did. Antibodies were also found in the nasal passages of infants in the prenatal-exposure group, suggesting a mucosal defense right where the virus enters.14PLOS ONE. Maternal transfer of IgA and IgG SARS-CoV-2 specific antibodies transplacentally and via breast milk feeding The practical takeaway: if you are breastfeeding and your baby catches COVID, continue nursing. Even if you are also sick, the antibodies you produce against the virus will pass through your milk.
Vaccination for Babies
COVID vaccines became available for children as young as six months in the United States in mid-2022. In the clinical trial evaluating the Moderna (mRNA-1273) vaccine in babies aged six to 23 months, the immune response met the benchmark set by young adults who had received the full adult dose, and no new safety concerns emerged beyond the low-grade, short-lived reactions seen in older age groups. Vaccine efficacy against symptomatic COVID was estimated at about 51% in the 6-to-23-month age group during a period when the omicron variant dominated.15PubMed. Evaluation of mRNA-1273 Vaccine in Children 6 Months to 5 Years of Age That is lower than what earlier variants showed, which reflects omicron’s ability to partially evade vaccine-induced antibodies rather than a problem with the vaccine itself. Protection against severe illness and hospitalization has consistently been higher than protection against any symptomatic infection.
Vaccine recommendations update regularly, and the formulations have been updated since the original trials. Talk with your pediatrician about whether your baby is up to date, especially if the baby has any of the risk factors for severe disease discussed earlier.
When COVID Looks Like Something Else
Fever, cough, runny nose, and fussiness in a baby could be COVID, RSV, influenza, or any of a dozen other common respiratory viruses. Distinguishing them by symptoms alone is essentially impossible. This matters because co-infection with more than one virus at the same time does happen and can make things worse. In a pediatric center study spanning nearly three years, RSV and COVID co-infections were uncommon, occurring in about 2% of RSV cases, but when they did occur they were linked to longer hospital stays and a greater need for respiratory support.16The Pediatric Infectious Disease Journal. Clinical Relevance of RSV and SARS-CoV-2 Coinfections in Infants and Young Children Another study of children under two found that about 21% of those with confirmed COVID also had a co-infection, and RSV was the most common partner virus.17PubMed Central. Clinical Presentation and Severity of SARS-CoV-2 Infection Compared to Respiratory Syncytial Virus and Other Viral Respiratory Infections in Children Less than Two Years of Age
The upshot is that a positive COVID test does not rule out a second virus, and a negative COVID test does not mean the baby is fine. If your baby’s symptoms seem disproportionately severe or are worsening after the point when you would expect improvement, the pediatrician may want to test for RSV, flu, or other pathogens.
MIS-C and Delayed Complications
Multisystem inflammatory syndrome in children, or MIS-C, is a rare but serious condition that can follow a COVID infection by two to six weeks. It involves widespread inflammation affecting multiple organ systems. The typical patient with MIS-C is older than most babies, with a median age between 6 and 11 years, and the most frequently affected systems are the gastrointestinal tract, the cardiovascular system, blood cells, and skin or mucous membranes.18PubMed Central. Multisystem inflammatory syndrome in children: A dysregulated autoimmune disorder following COVID-19 MIS-C is much less common in infants than in school-age children, but it has been reported in babies, so it is worth knowing the warning signs: persistent fever lasting several days, rash, red eyes, swollen hands or feet, abdominal pain, vomiting, and unusual sleepiness appearing weeks after a COVID infection. If you see this pattern, seek medical attention promptly. MIS-C responds well to treatment when caught early.
Long COVID in Babies and Toddlers
The conversation around long COVID has focused heavily on adults, but prolonged symptoms do show up in very young children. A 2025 study comparing infected and uninfected infants and toddlers found that about 41% of those who had been infected reported at least one prolonged symptom. The symptoms that were clearly more common in the infected group than in uninfected controls included trouble sleeping, fussiness, poor appetite, stuffy nose, and wet cough. In preschool-age children, daytime tiredness and dry cough were also elevated.19JAMA Pediatrics. Characterizing Long COVID Symptoms During Early Childhood A quarter of the uninfected children also had at least one prolonged symptom, which is a reminder that many of these complaints are common in early childhood regardless of COVID. Still, if your baby seems unusually off for weeks after an infection, it is reasonable to bring it up with your pediatrician.
The Toll on Parents
Caring for a sick baby during a pandemic is stressful in ways that go beyond the illness itself. Research on new mothers during the COVID era found significant increases in worry, anxiety, loneliness, and stress, driven by social isolation and disrupted support networks.20PubMed Central. Mental Health & Parental Concerns during COVID-19: The Experiences of New Mothers Amidst Social Isolation A study comparing infants seen in a clinical population before and after lockdowns found a notable increase in infant sleeping disorders alongside a rise in maternal panic and anxiety.21PubMed Central. Being an Infant in a Pandemic: Influences of the COVID-19 Pandemic on Infants, Toddlers and Their Mothers in a Clinical Population
If you are home with a sick baby, try to share the monitoring duties with a partner, family member, or friend. Sleep deprivation erodes judgment, and the anxiety of watching a baby breathe can become all-consuming. Ask your pediatrician’s office whether they offer a nurse triage line for after-hours questions; even just hearing a calm professional voice say “that sounds normal” can reset your stress level. And if your own anxiety feels unmanageable, talk to your own doctor. Postpartum mental health conditions are treatable and more common than many parents realize.
Disparities in Who Gets Hospitalized
Not all babies face the same odds when it comes to COVID hospitalization. A study analyzing pediatric hospitalization trends by race and ethnicity from 2020 through 2023 found that Black children were hospitalized at roughly twice the rate of Asian or Pacific Islander children, and Hispanic children at a similar multiple. Even as overall pediatric hospitalizations declined over time, Black and Hispanic children continued to be admitted to intensive care at disproportionately higher rates.22PubMed Central. Pediatric COVID-19 Hospitalization Trends by Race and Ethnicity, 2020-2023 The biological virus does not discriminate, but access to care does. A separate analysis found that insurance status and neighborhood-level deprivation accounted for virtually all of the variation in COVID hospitalization between racial and ethnic groups among children.23Annals of the American Thoracic Society. Multilevel Analysis of Racial and Ethnic Disparities in COVID-19 Hospitalization among Children with Allergies Families in under-resourced communities may face longer travel times to pediatric emergency departments, less access to telehealth, and greater barriers to getting time off work to care for a sick child. Being aware of these structural barriers is the first step toward working around them, whether that means identifying the nearest children’s hospital before an emergency or knowing which community health centers offer same-day pediatric visits.