In a commentary published in Pediatrics, two pediatric infectious disease experts concluded that while these studies are "far from definitive, the [research] provides early reassurance that school-based transmission could be a manageable problem." However, as testing of children has increased, scientists are learning more. Just last week, a top health official in Victoria, Australia, cautioned that child-to-child transmission is "more apparent" than was previously understood, as more kids have started to be tested. Other recent research suggests that the age of children may be a factor. Data from contact tracing in South Korea suggest that older children are more likely to spread the virus to their close contacts compared to younger children, particularly in a home setting. Researchers analyzed thousands of contacts of about 5,700 coronavirus patients (from January through March of 2020), looking at the age of the first infected person in a household. In homes where the first person infected in a cluster was 10 to 19, about 19% of their household contacts got COVID-19. In contrast, only 5.3% of the household contacts of younger children aged 0 to 9 were known to be infected.