@ Chinmay
Yes, you can do exercise but make sure with doctor because any upper respiratory illness can make cardio exercise very difficult & put more pressure on ur lungs & heart. This could put you at risk for making worse again. You should take proper rest with balanced diet - full of antioxidants which helps to improve ur immunity.
Iâll suggest you to go for simple walk or simple breathing exercise or simple yoga but before going to to any exercise better to consult with doctor or physiotherapy. Taking care of yourself is more important & help you to heal very fast & improve ur health as well.