Mosab Nouraldein Mohammed Hamad2023-12-052023-12-052021-10-112476-2377https://ds.eaeu.edu.sd/handle/10.58971/650Abstract Quick development of COVID.19 vaccines, trigger a big question about validity of clinical trials conducted on it. We observed several short-term consequences of this artificial method of immunization, but no one knows the long-term outcomes of it, I regarded that exogenous estrogen constituent of it as probable cause of breast cancer, specifically among older womenother