If there was any effect of this drug on COVID-19, it was minimal. Hydroxychloroquine, whose toxicity is far lower, may be safer than chloroquine. But that doesn't matter if the drugs are ineffective.
Chloroquine, the old malaria drug, is making news as a potential therapy for coronavirus. Does it belong in the headlines for its antiviral properties, or is it just hype and bluster? Will it become a drug? Let's find out.