Question

when another COVID-19 wave might happen in the U.S. in 2026?

Answer 1

Short answer: I can’t predict an exact date. Based on what we know about SARS‑CoV‑2 through mid‑2024, the highest chance of a sizable “wave” in the U.S. in 2026 would be in the late fall/winter months (roughly November–February), but a new variant or other changes could shift that and cause a surge at almost any time.

Why that range is most likely
- SARS‑CoV‑2 has shown seasonal patterns in many places, with larger peaks in cooler months when people spend more time indoors.
- Immunity from infection and vaccination wanes over months, so population susceptibility often grows toward the end of a year unless there’s a recent large wave or booster campaign.
- Historically (2020–2023) big waves tended to occur in fall/winter or shortly after the emergence of a new variant that had immune escape or transmission advantages.

Important uncertainties
- New variants: a variant with substantially greater transmissibility or immune escape can trigger a rapid surge anytime. That is the biggest wild card.
- Immunity landscape: how many people were infected or boosted in 2024–2025 influences 2026 risk.
- Behavior and policy: mask use, crowding, school schedules, and travel affect timing and size.

Signals to watch (they tend to precede or indicate a wave)
- Rising wastewater SARS‑CoV‑2 RNA levels.
- Increasing test positivity and reported cases over 1–2 weeks.
- Rising COVID hospital admissions.
- Detection of a new variant showing growth advantage in sequencing data.
Sources to monitor: CDC COVID Data Tracker (cases, hospitalizations, wastewater), local health departments, WHO, sequencing/variant dashboards (GISAID, Nextstrain, CoVariants summaries).

What you can do to prepare
- Stay up to date with recommended vaccines/boosters (especially if you’re older or high-risk). Getting a fall booster before an expected winter wave is generally sensible.
- Keep a small supply of at‑home tests and high‑quality masks (N95/KN95) for use during surges.
- Know how to access antivirals and local testing/health care if you are at higher risk.
- Improve indoor ventilation/humidity where possible.

If you want, I can:
- Watch the current indicators (wastewater, cases, hospital admissions) and summarize any changes for you if you tell me how often you want updates.
- Explain how to interpret specific data dashboards or set up public data alerts.

Note: my training data goes to June 2024, so I can’t use real‑time 2025–2026 data unless you provide it or ask me to check publicly available dashboards now.