However, this leaves space for the immune evasive Omicron to bypass vaccines and infect people.
GOOD NEWS is this 🍁 Autumn we have updated vaccines to target Omicron variant (bivalent) which will provide better protection against infection and disease.
🔺 Flu slides from @CDCgov clearly show the early high wave of flu in Australia - not mirrored in other Southern Hemisphere countries (South Africa 🇿🇦 Chile 🇨🇱)
🔺 H3N2 was the dominant subtype in Australia and Chile (>90% of subtyped specimens)
UPDATE2: I seem to have offended some people by calling 50+ “older” - this was a (perhaps clumsy) attempt at shorthand in a number-heavy thread. Apologies for this!
I hear you and will reword in future.
But to be clear older does not equal old!
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Eagle eyed variant watchers 🔎 have recently spotted a handful of Omicron lineages emerging from a deep field of runners.
Among these are:
• BQ.1 (+ child BQ.1.1)
• BA.2.75 (+ child BA.2.75.2)
• BF.7
Catchy names, I know, but bear with me…
Let’s start with the context of epidemiology in England.
The anticipated winter wave of COVID-19 infections has begun
Infections are disproportionately in older people (esp 75+). This is the age group that historically had lowest attack rates (lots of first infections?)