My father was suffered from lump near jaw just below ear. Our physician said it is due to viral infection. Our physician gave treatment and problem got resolve. There were no symptoms. 3 days before my father took second dose of covi shield vaccine. Before vaccine rapid test was negative. But after two days of vaccination he got fever for 1.5 day, body ache with weakness and 18 to 20 loose motion in 2days. Now he is feeling weakness. My question is what is a problem it is due to vaccine or something else.His oxygen is normal.  Pls. Help in this regard. Thank you.