Canadian researchers have measured transmission probability in young children compared to adolescents. The results are published in the journal Jama Pediatrics.

A total of 6,280 Canadian households were studied between June 1 and Dec 31, 2020. In each household, at least one case of SARS-CoV-2 infection under 18 years of age was present.

Their findings? Children aged zero to three years were more likely to transmit the infection than adolescents aged 14 to 17.

“This means that younger children may have a higher risk of transmitting SARS-CoV-2 to caregivers and siblings in the household than older children,” the researchers explain.

Why such a difference? Putting a young child in isolation is “almost impossible”, while regular hand washing and mask use are also difficult to implement.

The researchers recalled the importance of barrier measures (avoiding physical contact, wearing a mask and washing hands regularly) and pointed out that an adult still spreads more virus than a child.