Well, at this point hard to believe them. The first dose was supposed to be very effective. Then they came out with a second dose that they said was 100% effective with the first dose. Now they are developing a third dose saying the first two are 95% effective, attributing this to mutant variations too. Should be no surprise since Bill Gates predicted the future back last June and said on public TV, that one single dose would not be effective and you will need multiple shots. Bill Gates is of course, the biggest contributor to WHO for development of vaccines. I know few countries raising some concerns over these vaccines. Norway raises concern about Pfizer Covid-19 vaccine safety after 29 deaths back in January. Here is the kicker, they were ones underlying conditions. I be concerned about this vaccine if you have an underlying condition or elderly at this point. Sad, they are never really honest from the beginning.. No conspiracy theories here, just facts that can be verified through a simple search. Now you can understand my concerns. I got a healthy immune system and will pass on it. I do understand concerns of elderly and people with underlying conditions that want to be protected against a virus though.