From the first of January this year, vaccination against pneumococci entered the compulsory vaccination calendar. There are also more and more voices suggesting that it is worth vaccinating children against rotaviruses and meningococci. At the moment, these vaccinations are not on the compulsory vaccination calendar, but they are on the list of vaccinations recommended by the Ministry of Health. What are these pathogens? How can we protect ourselves against them? Finally, when is the best time to vaccinate a child?