“We still don't know what will happen in 2022, namely what the fourth dose will be, in what format the fourth dose will be and how it can be given or even if it will be necessary. Now we have to be prepared for all eventualities and I believe it is important for us to think, discuss and plan for the future”.

António Costa, has said that Portugal had already asked for vaccines for an eventual fourth dose. These inoculations, he explained, will be available starting in the spring and will soon be prepared for the new Covid-19 variant, Omicron.

Regarding the vaccination of the third dose, Serras Lopes considered that "it is running at the expected pace".