News The number of Americans injecting drugs skyrockets to nearly 3.7 million people in 2018, study finds July 15, 2022 Adrianna Rodriguez, USA TODAY Comments Off on The number of Americans injecting drugs skyrockets to nearly 3.7 million people in 2018, study finds Health experts worry the number of people who inject drugs in the U.S. may have risen even more during the COVID-19 pandemic.