CLINICAL MEDICINE

Detailed explanation-1: -As a result, babies tend to get a high number of infections, usually 4 to 8 per year. Babies’ immune systems begin to mature soon after birth. The number of infections begins to go down with time. By the time children are of school-age, their rate of infection is usually the same as the rate for adults.

Detailed explanation-2: -Children have more contact with others, and they have less developed immune systems to fight off infections. This means they are more likely to catch an illness that can spread from person to person. Some children have special healthcare needs.

Detailed explanation-3: -People of any age can catch COVID-19 . But it most commonly affects middle-aged and older adults. The risk of developing dangerous symptoms increases with age, with those who are age 85 and older are at the highest risk of serious symptoms.

Detailed explanation-4: -There is evidence that susceptibility to infection in adults aged over 60y is elevated compared to younger/middle-age adults. One study (3) estimates that for household contacts among persons aged 20-59y, the OR for infection is 0.64 (0.43, 0.97) compared to household contacts aged over 60y.