WHO is now closely tracking a delta subvariant found in 42 countries to see if it’s more transmissible
- WHO is now closely tracking a delta subvariant found in 42 countries to see if it’s more transmissible MarketWatch
- U.S. Bets on Covid-19 Boosters’ Efficacy Against a Changing Virus, as Doses Roll Out The Wall Street Journal
- Covid cases are dropping in the U.S. Is the delta wave over? NBC News
- There’s a new Delta variant. Here’s what we know about it The Boston Globe
- What we know so far about the Delta Covid sub-variant AY.4.2 The Independent
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