There is some breaking news here, that is creating a lot of interest. As yet the significance in unknown, but may well prove very significant.
As I stated in previous posts, we do not have a good lab test for immunity. They are crude antibody test, and do not measure T-cell response.
It has come to attention, that the UK has a steady high level of cases. They are not seeing the wave that Europe is seeing so far. This is particularly true for serious cases and the hospitals are not over loaded with Covid-19 like continental Europe.
One other thing stands out, that the elderly, who were primarily vaccinated with the AstraZeneca vaccine, are not seeing a spike.
Even more attention has been paid to India, where the population has almost exclusively been vaccinated with the AstraZeneca vaccine. The serum institute of India at Pune, have done a phenomenal job of producing the vaccine in the billions of doses. 81% of the population have had one dose and 42% two doses.
India has escaped subsequent waves, despite two large festivals and lots of mixing of the population.
Here is what it looks like.
So there have been preliminary studies of the T-cell response of the AstraZenca vaccine. It turns out that although this vaccine produces an inferior antibody response that wanes over time, it produces a good and prolonged memory T-cell response.
So it is possible and plausible, that this vaccine could be the way out of this fix.
India is now receiving a lot of attention. In addition India has supplied a vast amount of vaccine to the third world and continues to do so.
So watch this space!