The lancet has an article out which details the phase 1/2 results of the vaccine.
Of interest were the dates. 28 days to testing for a single dose and 56 days to testing for a booster dose.
It seems that the 56 days is what is driving the September time frame for Vaccine release which keeps getting reported.
This is also in line with the reports that AstraZenica is in full production for over 100m doses by September.
Encouraging is that a single dose shows a protective response in a very high number of patients but a booster dose, 28 days after the first, shows a protective response in 100% of patients.
Another encouraging fact is that this is not a new vaccine. It is the same construct as the MERS vaccine, they changed the protine signature to match covid-19. Given that MERS is called SARS Cov-2, or a coronavirus strain, it is not surprising that the vaccine is effective and also that it does not produce severe reactions.
I was talking to my brother yesterday and he was sneering about the chances of having a vaccine before mid next year. He should read a bit more.