The change occurred in 2020, researchers say. Overall firearm-related deaths increased 13.5% between 2019 and 2020, but such fatalities for those 1 to 19 years old jumped nearly 30%.

The No. 1 and 2 causes of death remain the same, but there have been a number of notable changes. And now there's a new disease to assess on the global landscape: COVID-19.