Actually what
@Pavel Buchnevich is mentioning isn't entirely wrong. I can't speak of the other vaccines, but Pfizer hid data from the FDA concerning heart damage that has been linked to their vaccine. It was 71 times more likely to bring about damage to a person's heart moreso than other vaccines. Then Pfizer tried to hide data from the US government
that their Covid vaccine killed 1200 people in the first couple of months when it was released. Each vaccine will have adverse effects to certain people, but Pfizer really looking like a epitome of evil.
E: Of course Kun retiring has nothing to do with the Covid vaccines though.