No, there is not a COVID outbreak happening right now. As of mid-April 2026, COVID-19 viral activity across the United States is at its lowest possible level. CDC wastewater surveillance, which tracks virus levels in sewage as a proxy for how much infection is circulating, rates national activity as “very low” for the week ending April 18, 2026. Every region of the country (Midwest, South, Northeast, and West) also registers at very low.
How Viral Activity Is Tracked Now
Wastewater monitoring has become the primary way public health agencies gauge COVID trends. Hospitals stopped being required to report COVID admission data to the CDC after May 2024, so the detailed weekly hospitalization dashboards that existed during the pandemic’s peak years are no longer updated. Instead, sewage testing picks up the slack: when people are infected, they shed viral particles that show up in wastewater treatment plants, regardless of whether those people ever get tested or see a doctor.
The CDC scores COVID wastewater levels on a five-tier scale. A reading up to 2 counts as “very low,” 2 to 3.4 is “low,” 3.4 to 5.3 is “moderate,” 5.3 to 7.8 is “high,” and anything above 7.8 is “very high.” The current national reading falls in that bottom tier, meaning viral circulation is minimal.
Which Variants Are Circulating
Even at low levels of spread, the virus continues to evolve. The dominant lineage right now is XFG and its sublineages, which together account for roughly two-thirds of sequenced cases. XFG.1.1 alone makes up about 32% of circulating virus, with the parent XFG lineage at 13% and XFG.14.1 at 8%. A handful of other lineages, including PQ.17 (7%) and PQ.2.8.1 (6%), fill out the rest. None of these have triggered a surge in cases or hospitalizations.
For context, new variants emerge regularly as the virus mutates, but a new lineage becoming dominant doesn’t automatically mean a new wave. What matters is whether a variant spreads fast enough and escapes enough immunity to drive a visible spike in illness. That isn’t happening right now.
What the Updated Vaccine Targets
The FDA has directed vaccine manufacturers to update the COVID shot for fall 2025 onward to target the JN.1 lineage, with a preference for the LP.8.1 strain. This is a routine annual update, similar to how the flu shot is reformulated each year to better match whatever’s circulating. If you haven’t gotten a dose recently and want to stay current, the updated formula will be available starting in fall 2025.
Current Isolation Guidelines
If you do catch COVID right now, the CDC’s guidance (updated in early 2024) treats it similarly to other respiratory viruses like the flu. You can return to normal activities once your symptoms have been improving for at least 24 hours and any fever has been gone for a full day without using fever-reducing medication. After that, the CDC recommends five more days of extra precautions: wearing a well-fitting mask around others, improving ventilation, keeping some distance, and practicing good hand hygiene.
How Reliable Home Tests Are
Rapid antigen tests still work, but their accuracy depends heavily on timing and symptoms. Research from a CDC household transmission study found that home tests correctly identified about 80% of infections that were actually contagious (capable of spreading to others). That number climbed to 94% on days when the person had a fever. On days with no symptoms at all, sensitivity dropped to just 45% for contagious infections.
The practical takeaway: if you feel sick and want to know whether it’s COVID, test when you have symptoms, ideally around day three after they start. That’s when both viral shedding and test accuracy peak. A negative result on a day you feel fine doesn’t rule out infection, so testing again when symptoms appear gives a much more reliable answer.
Seasonal Patterns to Watch
COVID activity in the U.S. has followed a loose seasonal pattern over the past few years, with surges tending to appear in winter and sometimes a smaller bump in summer. Spring has consistently been a lower-activity period, which aligns with what wastewater data shows right now. This doesn’t guarantee another wave won’t come, but there’s no signal of one building at this point. Keeping an eye on the CDC’s wastewater dashboard is the simplest way to spot early signs of a future uptick before it makes headlines.