Covid-10 - of the vaccines to be administered in Portugal, will there be more effective and safer vaccines than others?

Any vaccine that is authorized by the EMA must demonstrate quality, safety and efficacy. The main differences between vaccines are how they induce the body to acquire immunity.

Some vaccines will work in the traditional way. In it, components of the virus are injected and the immune system recognizes them as foreign entities, developing defenses against them.

Other vaccines, those further along in the authorization process, are called mRNA vaccines, and they inject information that allows the body to create a component of the virus, which in turn will prompt the immune system to develop defenses.

At present, there is not enough information to consider that one vaccine is better than another.

Source: INFARMED