I didnt read the whole article when I posted it but here is what I suspect.
Diary clash is an excuse because if he has Covid this will make people wonder about this
“Putin was earlier vaccinated with two doses of Russian anti-Covid drug Sputnik V, which this week was claimed to have been based on stolen secrets re-Britain’s AstraZeneca. Putin used his annual televised phone-in this June to cast Russia’s four vaccines as highly effective and safe, while taking a swipe at shots that are widely used in the West”
Isn’t it the third jab that is the killer shot for people over 65?