Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 3 months ago

Qaza fast is obligatory on you as soon as you can. If you become permanently ill and never able to fast, then you need to feed for every day a poor believer which is called Fidya. That is for the days missed while you are ill. For the days which you missed during your youth with out illness, you need to feed sixty poor believers for every day of missed fast.