Leer en español Stay vigilant and take steps to help curb fatal and nonfatal drug overdoses.   Fentanyl Remains Top Cause of OverdosesFentanyl is the primary opioid responsible for fatal and nonfatal overdoses in the Fairfax Health District. Since 2024, about 90% of all opioid overdose deaths have involved fentanyl. Progress is being made in reducing the number of fatal opioid overdoses. Community members are asked to take action to help further reduce the national opioid…