Influenza vaccination in Brazil was implemented in 1999 with the goal of vaccinating at least 70% of the population aged 65 or over. In 2000, the age limit was lowered to 60 years; in 2010, new risk groups were included as eligible to receive the vaccine; in 2008, the vaccination target was raised to 80%; and in 2017, to 90%, a target that remains to this day. Older people are considered a risk group for vaccination because they are more […]