World Health Organization (WHO) has ranked infections, such as lower respiratory infections, diarrhoea  diseases, and tuberculosis, in the top 10 causes of mortality worldwide in 2016. Most of the burden of these diseases has been observed in our country. HIV/AIDS is still a significant cause of death in overcrowded countries like us . malaria prevalence has been reduced due to massive investment and policy initiatives in the past years. However, eliminating malaria is still a big challenge in our country and Tuberculosis is others significant figures in our country.New infectious diseases, such as avian flu, swine flu, and coronavirus, are also emerging at a higher rate and spreading.that’s why i’m interesting about this field