Would you add dose/fractions to a post-mastectomy patient who had a two week break due to being COVID-19 positive?  

There are no data on how treatment breaks impact the effectiveness of PMRT. I doubt a two-week break has a substantial impact in the era of effective systemic therapy, particularly if hypofractionation is used. Having said that, I do tend to add 1 or 2 fractions when there is a treatment break or br...