As per the largest contact tracing study in the country, the COVID-19 transmission in India has been mainly spread by a small percentage of infected people. It also shows that children are key to the spread of the new coronavirus.
It has been found by researchers that over 70 % of COVID-19 infected patients did not infect any of their contacts in the country but 8 % of infected people accounted for 60 % of new infections.
The study conducted found that both deaths and cases were concentrated in the 40-69 year age group than is seen in high-income countries, among other trends.
On Wednesday the study was published in the journal Science which assessed that the disease transmission patterns in 5,75,071 individuals exposed to 84,965 confirmed cases of COVID-19 in the two states based on data collected by tens of thousands of contact tracers.
According to the scientists, including Ramanan Laxminarayan from the Center for Disease Dynamics, Economics, and Policy in New Delhi, the findings offer a peek into the pandemic’s trajectory in a low- and middle-income country, where most COVID-19 cases have occurred. Based on the data, the scientists said both cases and deaths in the two Indian states were concentrated in younger cohorts than expected from observations in higher-income countries.
The study said that same age contacts were at the greatest infection risk. As per researchers, children between 0-14 years of age have the highest infection risk of same age and the same pattern is reflected among adults older than 65 years of age.
The CFR ranged 0.05 % at ages 5-17 years to 16.6 at ages greater than 85.
After follow-up testing of exposed contacts, 70 % of infected individuals did not infect their contacts and 8 % infected 60 %. This finding tells the largest empirical demonstration of superspreading, which is when an unusually large number of individuals are infected by few other people.
Among the Indian states, Andhra Pradesh and Tamil Nadu are with the largest healthcare workforce and public health expenditures per capita. They also have effective primary healthcare delivery models, according to the study.
According to scientists, the majority of the population who died due to the infection had any co-morbidity, underlying health conditions, and diabetic.