It’s become a regularly occurring story line: Law enforcement agencies issue dire warnings, saying that officers have overdosed from an exposure to fentanyl, through the air, skin contact or even through administering CPR to someone experiencing an overdose, underscoring the dangers of the powerful synthetic opioid.

Last month, the Orange County Sheriff’s Office tweeted that three deputies became dizzy and were hospitalized after searching a vehicle they suspected contained fentanyl, punctuated by photographs of first responders in hazardous materials suits. The deputies suffered no serious injuries, the Sheriff’s Office said. Law enforcement officials across the country have issued dire warnings about secondary exposure to fentanyl, but medical experts said that is a misconception.

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