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Coronavirus: What research has shown about the effects of mRna vaccines on sperm

Vaccination with mRNA vaccines (Pfizer / BioNTech or Moderna) against coronavirus has no effect on sperm and male fertility.

Vaccination with mRNA vaccines (Pfizer / BioNTech or Moderna) against coronavirus has no effect on sperm and male fertility.

Researchers from the Department of Urology at the University of Miami School of Medicine in Florida, published in the Journal of the American Medical Association (JAMA), studied 45 men between the ages of 18 and 35 who took a sperm sample before who made the mRNA vaccine and who gave sperm again 75 days after the vaccine was given.

Sperm analysis showed that there was no qualitative difference after vaccination.

“We have another study that debunks the myths of vaccinators about the ‘effects’ of vaccines on fertility,” said Elias Mosialos, Professor of Health Policy at the London School of Economics and Political Science (LSE), on Facebook.

Eight of the 45 men had oligospermia before the vaccine and seven of them showed an increase in sperm count, while one remained oligospermic.

No man developed azoospermia (absence of sperm from the sperm) after coronavirus vaccination.

“70 days is the complete life cycle of sperm and it is enough time to see if the vaccine affects sperm parameters,” said researcher Daniel Gonzalez. He added that, as the analyzes showed, the vaccination did not affect the volume of the sperm, the concentration of sperm, nor their motility.

The researchers hoped the study would alleviate some men’s unreasonable hesitations about the possible effects of the vaccines on their fertility.

Link to the scientific publication: https://jamanetwork.com/journals/jama/fullarticle/2781360

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