Nyt tiedämme, että laumaimminuiteettia koronaan ei saavuteta sairastamalla vaan siitä voi olla jopa haittaa

Ja keväinen väestötason vastaanotto meillä olisi saattanut johtaa vain samanlaiseen lopputulokseen kuin nyt Btasiliassa eli viruksen mutaatioon jolla taas on monenlaisia seurauksia. Tarttuu helpommiin, rokote toimii huonommin...

That variant is believed to have evolved in the Manaus population as a way to get around 'herd immunity' in the city, according to Professor Barclay.

Studies have suggested that around 70 per cent of people in Manaus, situated in the heart of the Amazon rainforest, caught Covid-19 during the first wave of the virus in spring.

This may have put evolutionary pressure on the regular Covid strain to adapt to be able to slip past natural immunity to the original version, Professor Barclay said.

It may explain why, despite the majority of the 2million people of Manaus having natural immunity, the city is suffering an explosive second wave of the disease.