Thread by @Jean__Fisch

After my example of 🇩🇰 yesterday, @EricTopol shares the case of the 🇺🇸 which underlines again two points
A) the differences in immunity between countries can lead to very different levels of perceived mildness
B) a milder omicron can still create a lot of trouble

1/

https://twitter.com/EricTopol/status/1479241338277093376

@EricTopol Despite all the affirmations made, we still have a poor understanding of

/ The immunity wall in each country, i.e. who has what type of protection

/ How much Omicron evades this immunity

And these factors can lead to very different outcomes in different countries

2/

This does not mean that we may not see a very positive outcome from Omicron on 🇧🇪

It just means that it is very difficult to estimate this with confidence

On top, 🇧🇪 has a most contrasted vaccination coverage so Omicron may also pan out differently by region

3/

As I mentioned yesterday, I sincerely hope that the authorities are tracking the Omicron impact closely via sequencing of any positive case ending in hospital

Because, at the moment, this is the only hard information that can be of any concrete help

4/

In the meantime, I will continue to track admissions vs. cases and vs. ICU and report on how the link between them is changing

But these are, at best, very lagged indicators marred with biases (especially if testing doesn't follow / collapses), but it's the best we have got

END