Outbreak in Israel, Delta variant, infecting "fully vaccinated people", forcing another round of defensive measures.
“The entrance of the Delta variant has changed the transmission dynamics,” said Prof Ran Balicer, who leads an expert advisory panel on Covid-19 for the government.
www.hindustantimes.com
We are going to require third doses to get this under control, and since immunity from just prior infection is weaker than full 2 dose vaccination, and may wane faster over time, it's no longer accurate to hold that not vaccinating the previously infected is OK.
The new risk of infection is too great to rely on that.
AFAIK the protection levels go something like
1 MMR = previous infection within 6 months
2 One Dose O-AZ or mRNA vaccines
The protection between those above is not too dissimilar. Subject to correction as data comes out.
3 Two Doses O-AZ or mRNA vaccines
Currently termed "fully vaccinated", inadequate to halt Delta,
4 Two Doses of Different vaccines
Shown to be stronger than just one type, no data vs Delta.
5 Three Doses of same vaccine, either type
Reported to be able to stop "any variant", but data unpublished, cannot compare to 4 above, may be equal or lesser.
6 theoretically, Three doses of Different vaccines