“The first oral antiviral for treating COVID-19, Merck & Co.’s molnupiravir, received approval from the U.K. Medicines and Healthcare products Regulatory Agency on Nov. 4. But the approval, for people at high risk of severe disease, comes as a prominent virologist has suggested using molnupiravir could do far more harm than good, potentially unleashing new, deadlier variants of SARS-CoV-2.

Molnupiravir works by interfering with viral replication, littering the viral genome with mutations until the virus can no longer reproduce. The drug’s ability to mutate RNA has raised persistent fears that it could induce mutations in a patient’s own genetic material, possibly causing cancer or birth defects; studies so far have not borne out those fears.

Now, William Haseltine, a virologist formerly at Harvard University known for his work on HIV and the human genome project, suggests that by inducing viral mutations, molnupiravir could spur the rise of new viral variants more dangerous than today’s.”

https://www.science.org/content/article/prominent-virologist-warns-covid-19-pill-could-unleash-dangerous-mutants-others-see-little-cause-alarm