Q. I witnessed a baal tokea place a mask over the shofar’s open end when he was blowing to avoid spreading the virus. Is that correct to do?
A. Horav Shlomo Miller’s Shlit’a opinion is that since the tone of the shofar would likely be altered by the mask placed at the large end, the mitzva would not be performed correctly. The Rov recommended avoiding that even during the blowing during the month of Elul, however after the fact and in need, one may comply then since the blowing is only a minhag.
Rabbi A. Bartfeld as advised by Horav Shlomo Miller and Horav Aharon Miller Shlit’a