What you need to know about XBB.1.5, COVID’s latest variant


When did this variant emerge, and what about XBB.1.5 is catching virologists’ attention?

Does XBB.1.5 appear to have the potential to cause a wave of infections similar to Omicron last winter?

How does it compare to other variants in terms of likelihood to lead to hospitalizations and deaths?

How effective are the vaccines and bivalent boosters at defending against XBB.1.5? Are people who’ve already had COVID likely to be reinfected?

What does this newest variant tell us about how the virus is evolving?

What advice do you have for people with pandemic fatigue, especially as mitigation measures like public masking have been increasingly less common over time?

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