Q. I was told that women that have to go to the mikvah during these coronavirus days, should take a shower after they get back home, but not inside the mikvah itself. I live in an apartment on top of the mikvah, that has no connection or entry to the basement where the mikvah is located. Is it still permitted for me to take a shower at my apartment?
A. Remah (Y.D. 201: 75) maintains that women should not take a bath after immersing in a mikveh. Shach explains that this is based on Talmud (Shabbos 14a), to prevent observes thinking that the bath is the main purifier. Yabia Omer (8: 19), opines that Sepharadic women are lenient. (Remah was an Ashkenazi Posek.
However, Mareh Cohen quotes that Shevet Halevy (5: 125) is lenient for all women when it is done at home, and also quotes RS”Z Auerbach zt’l, that taking a shower is permitted. (See also Kitzur Shulchan Aruch 162 :9 and Taharas Yisrael 161).
Horav Shlomo Miller’s Shlit’a opinion is that in your particular case it is also permitted, as it is not considered being in the mikveh site.
Rabbi A. Bartfeld as advised by Horav Shlomo Miller Shlit’a