What's the point of giving someone a booster that the omicron virus has proven to evade
It still tops up your antibodies, so overall less people catch omicron. If less people catch it, that also means that less people can transmit it.
That may not stop omicron but it will have an overall impact on the number of cases at any one time. Its like a compound interest effect.
Interestingly research from SA is showing that T Cell response is holding up well against omicron. This isn't as good in older people so it is worthwhile boosting them for this reason.
And if you booster younger people you hopefully have at least some reduction in transmission which will protect the more vulnerable.
What the data is showing us is we will be better with variant specific boosters going forward to top up antibodies but many of us will retain protection from severe disease through tcells anyway. Antibody protection is our outer layer of protection which stops us getting infected but tcell immunity is our inner layer of protection which stops the worst of the damage if we do get it.
The crucial thing here is we don't know who has poor t cell protection. Hence giving it everyone. So we try and protect them with the highest level of antibody protection and a top up of t cell protection with a booster.
It will probably be the case that we will have regular boosters for a while - but it may become more targeted like flu vaccines as time goes on as they figure it out.
We know that tcell immunity in people who caught SARS is still detectable in some people 17 years later which is a positive thing.
The news is largely positive and means we should have some protection against other new mutations.
So the benefits of a booster are less than the first two doses but are worthwhile overall at a population level until things settle down. Which looks likely to be the case relatively soon.
The pressing concern is over sheer numbers of people sick - not just because of illness but more because of labour shortages which pose a safety risk in their own right.