In letter issued today the Archbishop of Washington asks that priests not sign letters of exemption:
“After prayerful examination, I ask that our pastors not provide religious exemption letters.
We, as Catholics—clergy and laity—must avoid any implication that vaccination against Covid-19 goes against Catholic moral principles. A religious exemption letter cannot be issued based on a supposition that the Church opposes the use of these vaccines.”
Full text of the letter: