An article titled “Cluster of coronavirus disease 2019 (Covid-19) in the French Alps, 2020” seems to suggest that children don’t transmit coronavirus, not even to high-risk people:
The occurrence in this cluster of one asymptomatic case with similar viral load as a symptomatic patient, suggests transmission potential of asymptomatic individuals. The fact that an infected child did not transmit the disease despite close interactions within schools suggests potential different transmission dynamics in children.
By the way, I’m very interested in studies that make contrary claims. Please leave links if you’ve come across such studies. I’m absolutely not wedded to any position here. I want to find out the truth, and I believe that nobody knows for sure everything there is to know about this virus yet. I’m completely open to any new knowledge on this.