It is better to avoid fasting following a severe infection within the last three months before fasting. Some people who had COVID 19 in the past may experience a prolonged and severe post-COVID syndrome. Some have a heightened risk of developing blood clots, blood pressure and heart rate variations, extreme exhaustion, and even lung fibrosis. People with prolonged illness secondary to COVID-19 can become severely dehydrated and risk sudden acute deterioration during fasting. Hence it is safe to abstain from fasting and let your body slowly recover. It is wise to undergo an assessment with your treating doctor to see if you can observe the fast. Please follow his advice closely on whether to fast or not.