coldfish wrote:dice wrote:anybody heard anything regarding herd immunity vaccination rate? scientists were speculating around 70% based on prior viruses, but i have heard that higher than that will be required for COVID-19. i would guess that delta complicates any estimates given that a large number of people got vaxxed prior to its appearance
There is a lot of debate if herd immunity is even possible. For the other commonly circulating coronaviruses, they come in a wave, hit everyone and recede, then come back in a while. You never get enough immunity to eliminate them.
https://www.cnbc.com/2021/08/12/herd-immunity-is-mythical-with-the-covid-delta-variant-experts-say.htmlAchieving herd immunity with Covid vaccines when the highly infectious delta variant is spreading is “not a possibility,” a leading epidemiologist said.
Experts agree on several reasons why such a goal — where overall immunity in a population is reached and the spread of the virus is stopped — is not likely.
Sir Andrew Pollard, head of the Oxford Vaccine Group, told British lawmakers Tuesday that as Covid vaccines did not stop the spread of the virus entirely — with vaccinated people still able to be infected and transmit the virus — the idea of achieving herd immunity was “mythical.”
“I think we are in a situation here with this current variant where herd immunity is not a possibility because it still infects vaccinated individuals,” said Pollard, one of the lead researchers in the creation of the AstraZeneca-University of Oxford vaccine.
“And that does mean that anyone who’s still unvaccinated, at some point, will meet the virus. That might not be this month or next month, it might be next year, but at some point they will meet the virus and we don’t have anything that will stop that transmission.”
While that certainly might end up being true, it seems to rely a lot on this bolded sentence. If they make a better vaccine that is Delta specific, this may not be true anymore, or it may be true infrequently enough to effectively not be true anymore.