San Juan, Argentina.- In the photos taken on May 29, 2023, health professionals participate in a vaccination day against the coronavirus. The national government through the Ministry of Health updated the recommendations to apply reinforcements of the vaccine against Covid-19. The main change is the modification of the intervals to give the new doses. For risk groups such as those over 50 years of age, immunocompromised patients and pregnant women, the booster should be applied 6 months after the last dose, while for people without risk factors, an annual booster dose is recommended.

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