The SARS-CoV-2 virus, which caused COVID-19, has over time transformed into a number of distinct strains. The virus is susceptible to mutation, giving rise to new strains. These mutations differed from one another in terms of transmissibility, sickness severity, and resistance to immunological response brought on by immunisation or prior infection. Here are the top strains that circulated so far.
Original COVID Strain
This was the virus's original strain that first appeared in Wuhan, China, and was responsible for the worldwide pandemic. It's commonly called the "wild type."
Delta variety (B.1.617.2)
Dr. Kuldeep Kumar Grover, Head of Critical care and Pulmonology, CK Birla Hospital, Gurugram says, “Initially found in India, the Delta variety quickly rose to prominence throughout the world. It was linked to higher transmissibility and worries about infections from vaccination breakthroughs.
Delta Plus Variant (AY.1)
In certain regions of India, there have been reports of the Delta Plus variant (AY.1), a sublineage of the Delta variety. There were more mutations in the spike protein, which led to worries about enhanced transmissibility and possible immune escape.
Omicron Variant (B.1.1.529)
Initially discovered in South Africa, the Omicron variant caused alarm on a worldwide scale. Although it was not initially detected in India, there were worries that travel abroad might bring it. It was discovered in multiple Indian states by January 2022, which prompted increased monitoring and containment measures.
Kappa Variant (B.1.617.1)
Found in India, the Kappa variant is another sublineage of the Delta variety. It shared certain genetic characteristics with the Delta variation, but otherwise differed somewhat.
ERIS (EG.5.1)
The first case of ERIS (EG.5.1) was discovered in India in May 2023. It was referred to as a variety of interest and was the newest subtype of Omicron.
