And that is why the US is no longer using AstraZeneca and several countries are putting holds on giving moderna shots to people 30 or younger? Those were both "safe" just a few months ago. We CANNOT KNOW what the long term effects are until enough time has passed. At one point in time medical experts thought cigarettes were good for us until enough time had passed and whaddya know smokers started getting cancer at a far higher rate than others. I HOPE you are right and the Pfizer vaccine is safe, but it is impossible to know for sure for at LEAST another ten years. Have you ever stopped to consider the consequences if you are wrong? If hundreds of millions of people were coerced into something with serious health implications?