Very large population having freedom to move, poor governance, added with poor health management and future vision as well as limited health resources & infrastructure are important factors related to increase in number of cases and deaths in India.
There may be different modes of transmission for SARS-CoV-2, including contact, droplet, airborne, fomite, fecal-oral, blood borne, mother-to-child, and animal-to-human transmission. Infection with SARS-CoV-2 primarily causes respiratory illness ranging from mild disease to severe disease and death, and some people infected with the virus never develop symptoms11https://www.who.int/news-room/commentaries/detail/transmission-of-sars-cov-2-implications-for-infection-prevention-precautions. Looking at huge number of cases and lack of well established meritorious scientific research it’s very difficult for India to control the pandemic. Like previous year if the pandemic subsides on itself then India should develop a proper strategy with future vision.
Environmental factors - The environmental factors of key importance are modifications and sanitary measures required to halt the progress of pandemic. Water, sanitation, food and air quality are vital elements in the transmission of communicable diseases and in the spread of diseases prone to cause epidemics.
A number of environmental factors influencing the spread of SARS-CoV-2 diseases are prone to cause epidemics. The most important of these are:
Conclusion – In the epidemiological triad we have agent/host/environment. For controlling this pandemic of covid-19 we have to apply clinical & public health approach. Our mind should be clear to have a keen and deep view of epidemiological triad. The epidemiological triad (concept of causation) consist of agent (causative factor), host (those who get infected from agent) and the surroundings (ecology, environment etc.).
What we can do regarding agent; - We have to assess following and act accordingly