It has nothing to do with where it comes from, in all those countries there are the main vaccines, such as those from Pfizer, Jhonson & Jhonson and others, the question and logic says: "If there is already a vaccine, it must provide immunity" for example in In the case of Colombia, people who have injected the 2 doses of Pfizer still got sick and some died, so where is the effectiveness? It makes no sense for me to vaccinate if the effectiveness is below 33%, this is my personal perception, since pfizer is going for the 3rd dose, and I am sure that at any moment another strain will appear and they will continue to create more vaccines, so stop Me, All this is a business model, and it is very logical, there will come a time when this vaccine will have to be paid for for those who want to be more immunized, this is what I think, obviously in the news or whatever means they will say it is They need to get vaccinated, but according to my understanding, they have to wait at least 4 or 5 years so that they can study the virus well and get an efficient vaccine at least 90% acceptable.
Pfizer has an efficacy of 42% against the delta variant, and not 33% as you claim. It is low, but you need to keep in mind that it offers more than 99.5% efficacy against hospitalization, even from the mutant strains. It is very simple actually. You can analyze whether you will be better off with the vaccine or not. The available data makes it clear that those who are vaccinated are 200 times less likely to die from the delta variant, compared to those who are unvaccinated. And regarding the third booster dose, there is nothing we can do about it. As long as we don't have a better option, it needs to be taken.