"Male participants are eligible to participate if they agree to the following requirements during the intervention period and for at least 28 days after the last dose of study intervention,which corresponds to the time needed to eliminate reproductive safety risk"
https://pfe-pfizercom-d8-prod.s3.amazonaws.com/2020-09/C4591001_Clinical_Protocol.pdf
page 123
"Male participants are eligible to participate if they agree to the following requirements during the intervention period and for at least 28 days after the last dose of study intervention,which corresponds to the time needed to eliminate reproductive safety risk"
Thank you, much appreciated!