
Reaching herd immunity is “not a possibility” with the current Delta variant, the head of the Oxford Vaccine Group has said.
Giving evidence to MPs on Tuesday, Prof Sir Andrew Pollard said the fact that vaccines did not stop the spread of Covid meant reaching the threshold for overall immunity in the population was “mythical”.
“The problem with this virus is [it is] not measles. If 95% of people were vaccinated against measles, the virus cannot transmit in the population,” he told the all-party parliamentary group (APPG) on coronavirus.
“The Delta variant *** will still infect people who have been vaccinated. And that does mean that anyone who’s still unvaccinated at some point will meet the virus … and we don’t have anything that will [completely] stop that transmission.”
Although the existing vaccines are very effective at preventing serious Covid illness and death, they do not stop a fully vaccinated person from being infected by the virus that causes Covid-19.
The concept of herd or population immunity relies on a large majority of a population gaining immunity – either through vaccination or previous infection – which, in turn, provides indirect protection from an infectious disease for the unvaccinated and those who have never been previously infected.
PS *** after 'the Delta variant' I'd add - 'or any subsequent variant which comes along' - just like the Common Cold does which is also a tyoe of Coronavirus.
PPS The BBC headlline for the same information is "Oxford-jab chief criticises UK's Covid booster plan".
I'd classify that as 'spin' and will try to keep working it all out for myself. Unlike the BBC my only agenda is my welfare.
