Tedros Adhanom Ghebreyesus, Director-General of the World Health Organization (WHO), during the inauguration of the WTO Presidential Lecture Series, at the World Trade Organization (WTO) Headquarters in Geneva, Switzerland, on of March 2022.| Photo: EFE\/EPA\/SALVATORE DI NOLFI A group of experts from the World Health Organization (WHO) indicated this Thursday (02) have concluded that people with "hybrid immunization", that is, who have been vaccinated and had Covid-02, they have greater protection than the others.According to a statement issued by the WHO Strategic Advisory Group of Experts for vaccines (SAGE), the protection of these people against possible serious forms of infection by the new coronavirus is greater than that of those who did not have the disease or were not vaccinated. The conclusion is based on infections with SARS-CoV-2 variants that were prior to the current dominant, which is the omicron. Studies, however, cannot yet determine the exact duration of this "hybrid immunization" or whether it would be effective against possible future variants of the new coronavirus. SAGE experts point out, in any case, that vaccination against Covid-19 should be a priority, regardless of whether the patient has contracted the disease before or not. Therefore, the WHO group indicates that States should focus the application of immunizations on the adult population, especially in risk groups, such as health professionals and the elderly.