If anything the kids were infected by an adult and did not infect any adults...
"....A 9-year-old British boy contracted the virus at a chalet while skiing in the French Alps. But he did not pass on the virus, despite coming into contact with more than 170 other people, including his siblings and over 112 pals at three separate ski schools.
Of 68 sick Chinese children admitted to a children’s hospital, 96% were found to have been sickened at home by adults, researchers reported in July’s issue of the journal Pediatrics. In an Australian high school, 863 pupils and teachers had had close contact with 18 sick students and staffers – but just two, or 0.23%, were infected.
Swiss researchers analyzed data on 39 children under age 16 and found that in nearly 80% of cases, the illness came from an adult in the house, according to a May study in the journal Pediatrics. Research from the Netherlands also found that the virus is mainly spread from adult family members to children....
https://www.ocregister.com/2020/07/10/coronavirus-why-kids-arent-the-germbags-and-grownups-are/