Figures:
Figure 1: Person to person transmission of SARS-CoV-2 mainly depends upon air droplets and direct contact with infected person. After the transmission the viral particles undergo six step viral replication in human body such as 1) Viral entry through plasma membrane or endosomes 2) translation of viral replicating machinery 3) replication of viral particles 4) structural proteins translation 5) assembly of virion and 6) release of the viruses. Furthermore, the figure also explains the immune responses and conditions which develop after the infection. There are three types of infections; asymptomatic, mild and severe.