The whole group of coronavirus is very peculiar. They are pleomorphic, single stranded RNA viruses measuring 100-160 nm in diameter. There are several factors responsible for the continuation of covid-19 pandemic. Broadly we can look at the epidemiological triad i.e. agent, host and environmental factors.
Setting and design – Different aspects of Covid -19 structural variations (see table 2) and its effect will be analysed. Brief details about epidemiological triad will be outlined.