Research Article

The Omicron Wave in India, Mumbai, and Delhi: Prevalence and Pathogenicity

Zameer Shervani
Food and Energy Securities, Japan
* Corresponding author
Deepali Bhardwaj
Centre for Skin and Hair Pvt. Ltd., India
Sadia Hasan
Jamia Millia Islamia, India
Umair Yaqub Qazi
University of Hafr Al Batin, K.S.A.
Manseej Purang
Darne Clinic, Mauritius
Aiman Ibbrahim
Aligarh Muslim University, India
Venkata Phani Sai Reddy Vuyyuru
Citizens Speciality Hospital and American Oncology Institute, India
Arif Siddiquie
Amity University, India
Abdullah Sherwani
Aligarh Muslim University, India
Adil Ahmed Khan
All India Institute of Medical Sciences, (AIIMS), India
Kehkeshan Fatma
Aligarh Muslim University, India
Samar Siddiqui
Medanta Hospital, India
Nudrat Jamal
Genomia Diagnostics Research Pvt. Ltd., India
Shazma Khan
Santosh Medical College, India
DOI icon 10.24018/ejmed.2022.4.3.1376

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Submitted 2022-05-28
Published 2022-06-22

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Article Main Content

The dynamics of the Omicron variant in India, Mumbai, and Delhi have been studied. The % share of the Omicron variant in overall India rose from 0.35% to 97.12% during the period November 29, 2021, to February 7, 2022. Due to the emergence of the Omicron variant, the daily new infections in India rose from a baseline tally of below 8,000 cases to the highest number of 347,063 cases recorded on January 20, 2022. In Mumbai, the Omicron variant completely replaced the Delta and other lineages as reported on March 3, 2022 genome sequencing report. In Mumbai because of the Omicron variant surge, the new infections rose to 20,971 on January 7, 2022, from a baseline tally of 191 daily cases recorded after receding the second Delta variant wave. In real-time, the vaccine effectiveness among the Indian population during the Omicron variant surge was studied and noticed that the two-dose regimen was 99.3% effective in preventing death. The death rate among the hospitalized patients was reduced by 12% among the vaccinated individuals compared to the unvaccinated ones. During the Omicron variant wave, the average age of the COVID-19 patients shifted by 11 years towards the younger age which was because the vaccination among the younger population was low compared to the elderly population.

Keywords: Mortalities prevention, Omicron pathogenicity, Omicron variant, spread dynamics, vaccine effectiveness

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