Kolkata: The second wave of pandemics affects more young people and middlelyaged, along with women, in Kolkata rather than the first wave affecting more parents, revealing a study conducted by a peerless hospital that has been published in the Journal of Microbiology and contagious diseases.
The amount infected with asymptomatic, research says, rises significantly during the second wave.
Entitled ‘Demographic Covid-19 in two waves in one center’, research compares data from the first wave with the second.
While around 34% of them were positively tested during the first wave of between 18 and 45 years old, the figure rose to 40.1% during the second wave.
For those with above 60, the figure fell from 31.4% during the first wave to 24.4% during the second wave.
A total of 67,121 samples were tested at the hospital molecular testing laboratory between May 2020 and July 2021 were taken for this research.
The overall level of 23.8% is recorded for 15 months.
Comparison between positive individuals Covid men and women revealed that more men were influenced by women – around 58% of 42% – during the study period.
Age-wise analysis shows dominant men mainly observed in the group above-60 – 33.6% in men vs 28% in women – during the first wave.
However, in the second wave, women are more affected by adult age groups and young adults.
“There may be two reasons behind this.
While women have better immunity, the level of vaccination for women is quite late in the drive,” said Bhaskar Narayan Chaudhuri’s microbiologist, one of the co-authors who conducted research together with Rishav Mukherjee, Dharitri Chaudhuri, Arup Kumar Mitra, Partha Guchha, Subhrojyoti Bhowmick and Satadal Das.
This study found Covishield more effective than Covaxin after one dose.
The efficacy of Covaxin increased slightly after both doses.
Among the subjects, 1,744 patients had received the first dose and 828 patients received the second jab of covishield or covaxin.
“But whether it’s covishield or covaxin, maximum benefits in terms of death and severe disease can be achieved by taking both doses.
Therefore, complete vaccination is very important,” said Subhrojyoti Bhowmick, Director of Peerless, clinical research and academics.
In the first wave, 59.2% of positive patients were symptomatic at the time of testing, while 40.8% found asymptomatic.
The second wave has 46.7% of symptoms and 53.3% of asymptomatic patients at the time of testing.
Only patients from Kolkata are considered for this retrospective study.