1. There is a new global flu report out from @WHO, so, a 🧵.
#Flu activity is picking up globally after the historic low levels seen in the first year & a half of the #Covid19 pandemic. In some places, WHO says, activity is now at levels see before the pandemic.
#Flu activity is picking up globally after the historic low levels seen in the first year & a half of the #Covid19 pandemic. In some places, WHO says, activity is now at levels see before the pandemic.
2. @WHO didn't stipulate which countries are experiencing as much #flu now as they would have at a corresponding time of the year in the pre-pandemic era. I've asked & will add the info if I get it. It could be in parts of Europe. This from @ECDC_EU.
3. The global positivity rate for the period from Dec. 6 to Dec. 26 was 5.2%, which is above where it was in mid-March, 2020 when #flu activity worldwide collapsed.
The new rate is based on more than a half-million diagnostic tests conducted across 110 countries.
The new rate is based on more than a half-million diagnostic tests conducted across 110 countries.
4. The amount (and type) of #flu circulating varies a lot by region. In North America, it is increasing but still low for this time of year. In North America & Europe, it's almost all #influenza A/H3N2. Interestingly, in China it's all flu B.
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