To be fair, they did mention the dosage right in the abstract, 150µg/kg. It was conducted in 2011 so Covid wasn't around. It's just a study examining the sperm counts. I'm not sure what you mean by percentages, as they said that every one of the participants experienced varying amounts of a decreased sperm count with specific numbers cited in the tables/charts.
It's a single study with a small sample size, so it doesn't mean the end of the world, but it's just surprising that people will brush off the most stringent method of safety when it comes to vaccines and at the same time be okay with taking something that has so little research done on it's efficacy. I can only imagine if a single study came out that said getting the Pfizer jab potentially lowers sperm count to the level this study suggests (And others, cited in the paper)-- and then the level of backlash that would follow. The worst actual link that has come from any of the vaccines has been singe to double digit cases per million.
