Compared to adults, the number of cases and proportion of severe COVID-19 disease among children is significantly low. In most instances, the proportion of childhood cases are approximately 10% or less of all COVID-19 positive patients. However, with the acute surge of the total number of cases, the number of reported cases among children has risen. Therefore, a high possibility of children with severe disease is also expected, along with the increased number. Following hypotheses have been proposed on why children are less susceptible to acquire COVID-19 infection or develop severe disease compared to adults.
Data on the exact incubation period in children is limited. Generally, the median incubation period is five days but may extend up to 14 days. Usually, children develop symptoms 2-10 days after exposure.