Hydroxychloroquine didn't protect health care workers from coronavirus, study shows

Another study is warning against President Trump's debunked coronavirus treatment.
Despite being studied as an early coronavirus treatment, studies have found the malaria drug hydroxychloroquine ineffective and even dangerous when used to fight coronavirus. A study published Wednesday added to that evidence, finding that the drug was ineffective in preventing health care workers from contracting coronavirus.
For the study published in JAMA Internal Medicine, researchers at the University of Pennsylvania focused on 125 health care workers. Some of them received hydroxychloroquine for eight weeks from April to July, while others got a placebo. Throughout that time, four of the 64 workers who got the drug ended up with COVID-19, while four of the 61 who got the placebo did as well. Six of those who tested positive developed coronavirus symptoms, but none needed to be hospitalized. As a result, the researchers said they "cannot recommend the routine use of hydroxychloroquine" to prevent infections among health care workers.
Subscribe to The Week
Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.

Sign up for The Week's Free Newsletters
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
In June, a clinical trial published in the New England Journal of Medicine also showed hydroxychloroquine wasn't effective in preventing coronavirus infections after exposure to the virus. The FDA has since removed its emergency use authorization for the drug as a coronavirus treatment, and in July it released a study showing how the drug could cause serious side effects in hospitalized patients.
Sign up for Today's Best Articles in your inbox
A free daily email with the biggest news stories of the day – and the best features from TheWeek.com
Kathryn is a graduate of Syracuse University, with degrees in magazine journalism and information technology, along with hours to earn another degree after working at SU's independent paper The Daily Orange. She's currently recovering from a horse addiction while living in New York City, and likes to share her extremely dry sense of humor on Twitter.
-
Today's political cartoons - March 8, 2025
Cartoons Saturday's cartoons - trade wars, healthcare costs, and more
By The Week US Published
-
Marbled tea eggs recipe
The Week Recommends With a beautiful exterior, these eggs are also marked by their soft yolk
By The Week UK Published
-
The Washington Post: kowtowing to Trump?
Talking Point The newspaper's opinion editor has handed in his notice following edict from Jeff Bezos
By The Week UK Published
-
Crafting emporium Joann is going out of business
Speed Read The 82-year-old fabric and crafts store will be closing all 800 of its stores
By Peter Weber, The Week US Published
-
Trump's China tariffs start after Canada, Mexico pauses
Speed Read The president paused his tariffs on America's closest neighbors after speaking to their leaders, but his import tax on Chinese goods has taken effect
By Peter Weber, The Week US Published
-
Chinese AI chatbot's rise slams US tech stocks
Speed Read The sudden popularity of a new AI chatbot from Chinese startup DeepSeek has sent U.S. tech stocks tumbling
By Peter Weber, The Week US Published
-
US port strike averted with tentative labor deal
Speed Read The strike could have shut down major ports from Texas to Maine
By Peter Weber, The Week US Published
-
Biden expected to block Japanese bid for US Steel
Speed Read The president is blocking the $14 billion acquisition of U.S. Steel by Japan's Nippon Steel, citing national security concerns
By Peter Weber, The Week US Published
-
Judges block $25B Kroger-Albertsons merger
Speed Read The proposed merger between the supermarket giants was stalled when judges overseeing two separate cases blocked the deal
By Peter Weber, The Week US Published
-
Rupert Murdoch loses 'Succession' court battle
Speed Read Murdoch wanted to give full control of his empire to son Lachlan, ensuring Fox News' right-wing editorial slant
By Peter Weber, The Week US Published
-
Bitcoin surges above $100k in post-election rally
Speed Read Investors are betting that the incoming Trump administration will embrace crypto
By Peter Weber, The Week US Published