COVID-19 unlikely to be transmitted through semen, study shows

COVID-19 is unlikely to be spread through semen, according to University of Utah Health scientists who participated in an international study of Chinese men who recently had the disease. The researchers found no evidence of the virus that causes COVID-19 in the semen or testes of the men.

The study was not comprehensive enough to fully rule out the possibility that the disease could be sexually transmitted. However, the chances of it occurring, based on this limited finding, appear to be remote.

The study appears in Fertility & Sterility, a peer-reviewed journal published by the American Society of Reproductive Medicine. The international team of researchers from China and the United States launched the study in response to concerns that SARS-CoV-2, the virus that causes COVID-19, could be sexually transmitted like Ebola, Zika and other emerging viral pathogens. To find out, they collected semen samples from 34 Chinese men one month (on average) after they were diagnosed with mild to moderate cases of COVID-19. Laboratory tests did not detect SARS-CoV-2 in any of the semen samples.

But just because the virus wasn’t present in the existing semen didn’t necessary rule out that it hadn’t entered the testes where sperm cells are formed.

“If the virus is in the testes but not the sperm it can’t be sexually transmitted,” says Jingtao Guo, Ph.D., a postdoctoral scientist at the Huntsman Cancer Institute at the University of Utah who also co-authored the study. “But if it is in the testes, it can cause long-term damage to semen and sperm production.”

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