Blood donation; update on face coverings

Last summer I mentioned my surprise at not being permitted to wear my mask at any point during the blood donation session. This time felt safer, today it was fine for me to wear it except while actually donating.

This will probably be the last time I donate for quite some while unless people have other uses for my blood. Thanks to mad cow disease, having grown up in England renders me ineligible to donate after I return to the US.