Banking on serology: On seroprevalence studies

Banking on serology: On seroprevalence studies

Study reveals:

A recent serology survey that scientists used to estimate the spread of COVID-19 in Mumbai has found that nearly 57% of those tested in slums had been exposed to the virus and had developed antibodies against it as compared to only 16% of those tested in residential societies.
Results from Delhi’s seroprevalence study, earlier this month, found that nearly a quarter of the 21,000-odd samples tested had been exposed to the virus and some of the densest districts had over 20% prevalence.
Of the nearly 7,000 tested in Mumbai, nearly 61% were slum-dwellers and the higher prevalence of the virus there showed that — as expected — those living in the densest urban agglomerations were most likely to have been infected by it.
A large proportion of those in whom antibodies were detected were asymptomatic and this pointed to the fact that the fatality rate in Mumbai may be “as low as 0.05-0.10 per cent, instead of the existing 5.5 per cent,” as per an estimate accompanying the results of the survey.

Herd immunity-unscientific

Such serological surveys are increasingly being used by States. Ahmedabad’s civic body conducted one to conclude that only 17% of the city had been likely exposed to the virus and Tamil Nadu too is in the midst of conducting such a survey.
A dominant theme driving State bodies that commission such surveys is to check for levels of ‘herd immunity’, or if 60%-70% of the population have encountered the infection.
The argument is that this degree of exposure will, akin to a vaccine, also protect the rest of those uninfected.
But given the absence of knowledge about how long antibodies last and the extent to which they protect from fresh infections, herd immunity isn’t a precise science and not something that ought to be pursued by a state as a matter of policy.
It is four months since India got its first 100 cases and very early in May, the Indian Council of Medical Research’s survey had shown that the number of those infected by the virus were many multiples of those that were being reflected in official confirmed-case statistics.

Conclusion

The unrelenting advance of the virus shows that while it is much less of a killer, in aggregate, than expected, it spares few from infection.
Therefore, in the absence of a reliable vaccine, the vast majority of people everywhere — irrespective of peaks and ebbs in daily caseloads — continue to be vulnerable.

Source: TH

Join Our Telegram

Voice clone-AI

Pradhan Mantri Suryodaya Yojana

06 Feb, 24
SHARE

Recently, Prime Minister announced Pradhan Mantri Suryodaya Yojana under which 1 crore households will get rooftop solar power systems. India’s Status of Current Solar Capacity India currently stands at 4th place globally in solar power capacity. As per Ministry of New an

Foreign Contribution Regulation Act (FCRA)- NGO

06 Feb, 24
SHARE

The Foreign Contribution Regulation Act, 2010 (FCRA) registration of two prominent non-governmental organisations (NGOs) — Centre for Policy Research (CPR) and World Vision India (WVI) have been cancelled this month. What is FCRA? Key provisions of FCRA, 2010 Key aspects Description

Voice clone-AI

06 Feb, 24
SHARE

Voice clone fraud has been on the rise in India. AI voice cloning – It is the process of creating a synthetic replica of a person’s voice through machine learning and speech synthesis technology.It is called as voice deepfakesor audio deepfakes. Objective – To achieve a high level of na

Science communication- how to promote

06 Feb, 24
SHARE

Steps taken by India to promote Science Communication Publications and Information Directorate (PID) - An organisation under Council of Science and Industrial Research (CSIR) established in 1951 for publishing and disseminating scientific information in India. National science magazines- The PI

Universal Basic Income (UBI)- Analysis

05 Feb, 24
SHARE

Universal Basic Income (UBI) can strengthen welfare architecture and unlock the nation’s latent demographic potential. UBI - It is an income support mechanism typically intended to reach all or a very large portion of the population regardless of their earnings or employment status. Objective- To provide enough to co