UPSC CSE – SYLLABUS – GS – 3-  Science and Technology- developments and their applications and effects in everyday life.

Awareness in the fields of IT, Space, Computers, robotics, nano-technology, bio-technology and issues relating to intellectual property rights.

 UV radiation & COVID – 19

The novel coronavirus has now seen all the seasons in both hemispheres, but the effect of seasonal factors such as temperature and humidity remains to be fully understood. New research has now looked at the influence of another seasonal variable — ultraviolet radiation from the Sun — and found evidence is that higher natural UV radiation reduces Covid-19 transmission. The study is published in the journal PNAS.

UV radiation and effects:

The analysis model:

The extent of variations:

A change in UV exposure by 1 standard deviation, the analysis found, reduced the growth rate of new cases by around 1 percentage point over the following two weeks.

A change of 1 percentage point, for context, is approximately equivalent to the change in UV between April and May in Delhi.

Final inference:


Source:” Indian Express”.


Discuss the effects of Ultra Violet radiations on corona virus spread. Has it been effective?