Ista tema.
Izasla je studija u kojoj su analiziriali da li osobe koje su preboljele COVID imaju zastitu protiv nove mutacije. Rezultati su bili vrlo razliciti, uz napomenu da je uzorak vrlo mali.
In work that has yet to be peer-reviewed, the team at the National Institute for Communicable Diseases in Johannesburg found
that the potency of antibody-rich plasma varied widely
The neutralising ability of plasma from some patients fell a staggering 64-fold when tested against the new variant, while for others the ability to wipe out the new variant was unaffected. Nearly half, or 21 of 44 patients, “had no detectable neutralisation activity”, the scientists write.
To, naravno, moze uticati i na efikasnost vakcine i taj je rizik prepoznat (to jeste "crni" scenarij) pa su planovi zapoceti jos jesenas
If the results from South Africa are confirmed,
the risk of the variant spreading more widely would justify planning for a “potential strain update” this autumn, said Trevor Bedford, who works on immunology and virus evolution at the University of Washington.
“I’ll be getting the vaccine as soon as I’m able,” he tweeted. “We have an amazing vaccine now that works against currently circulating viruses.
And if it becomes necessary, this emerging situation can be dealt with through a forthcoming vaccine update.”
An
eight-fold drop in neutralisation is the threshold the World Health Organization uses to decide when updates are needed for seasonal influenza vaccines, though the two infections are not directly comparable.
Meanwhile, further research suggests the Pfizer/BioNTech vaccine does protect against the B117 variant blamed for the rapid rise in cases in London and south-east England.
“The news should not be considered surprising, but is very welcome. It will be interesting to carry out the same experiments with the South African variant,” said Dr Jonathan Stoye, a virologist at the Francis Crick Institute.
Clanak:
https://www.theguardian.com/society/202 ... 1611160223
Studija:
https://www.biorxiv.org/content/10.1101 ... 8.427166v1