Fasting on Tisha B'Av for a Cancer Patient Undergoing Biological Treatment | Sheilot

Fasting on Tisha B'Av for a Cancer Patient Undergoing Biological Treatment

Question

I have metastatic breast cancer, diagnosed a year and a half ago. I’m 36 years old and currently receiving the injection Phesgo (Herceptin and Perjeta — biological treatments). I finished chemotherapy about 9 months ago and generally feel well. Should I fast on Tisha B’Av? 

Thank you.

Answer

Shalom UvRacha,

Do not fast at all.

In this condition, you are still considered ill and are exempt from fasting.


Answered 27 July 2025 How answers are reviewed
Answered by
Answers questions at Rav Amram Fried's Beit Horaah
Smicha "Yoreh-Yoreh" (2012), Rav Amram Fried's Beit Horaah
Orach Chaim, Yoreh Deah
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