India's COVID graph may peak at 33-35 lakh active cases by May 15: IIT scientists

Rahul M
·4-min read
NEW DELHI, INDIA - APRIL 22: medical staff and a Covid Patient admit her outside the Covid-19 ward at Lok Nayak Jai Prakash (LNJP) hospital on April 22, 2021 in New Delhi, India. Delhi logged 26,219 fresh Covid-19 cases and 306 deaths due to the Covid on Thursday amid a growing clamour for oxygen and hospital beds in the city. The national capital's cumulative tally rose to 9,56,348 and the death toll stood at 13,193, according to health bulletin. (Photo By Sonu Mehta/Hindustan Times via Getty Images)

The ongoing second wave of the COVID-19 pandemic in India may peak between May 11-15 with 33-35 lakh total ‘active’ cases and decline steeply by the end of May, according to a mathematical module devised by IIT scientists.

On Friday, India saw a single-day rise of 3,32,730 (3.32 lakh) COVID-19 infections and 2,263 fatalities with 24,28,616 (24.28 lakh) active cases.

 In predicting that the active cases would go up by about 10 lakh by mid-May before sliding, scientists from the Indian Institute of Technology in Kanpur and Hyderabad applied the ‘Susceptible, Undetected, Tested (positive), and Removed Approach’ (SUTRA) model.

 The scientists also said Delhi, Haryana, Rajasthan and Telangana may see a high of new cases by April 25-30, while Maharashtra and Chhattisgarh might already have reached their peak in new cases.

“We have found that there is a reasonable chance that the active cases in India could peak sometime between May 11-15 with 33-35 lakh cases. It is a sharp slope, but on the way down, it would likely be equally sharp, coming down very fast and by end of May may see a dramatic reduction,” Manindra Agrawal, professor at the Department of Computer Science and Engineering, IIT-Kanpur, told PTI.

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NEW DELHI, INDIA - APRIL 22:  A Covid-19 patient on oxygen support waiting for admission amid a shortage of beds, at LNJP Hospital,  on April 22, 2021 in New Delhi, India. Delhi logged 26,219 fresh Covid-19 cases and 306 deaths due to the Covid on Thursday amid a growing clamour for oxygen and hospital beds in the city. The national capital's cumulative tally rose to 9,56,348 and the death toll stood at 13,193, according to health bulletin. (Photo by Amal KS/Hindustan Times via Getty Images)
NEW DELHI, INDIA - APRIL 22: A Covid-19 patient on oxygen support waiting for admission amid a shortage of beds, at LNJP Hospital, on April 22, 2021 in New Delhi, India. Delhi logged 26,219 fresh Covid-19 cases and 306 deaths due to the Covid on Thursday amid a growing clamour for oxygen and hospital beds in the city. The national capital's cumulative tally rose to 9,56,348 and the death toll stood at 13,193, according to health bulletin. (Photo by Amal KS/Hindustan Times via Getty Images)

The scientists in the as yet unpublished study said there are several novel features in the SUTRA model. Whereas previous papers divided the patient population into asymptomatic and Infected, the new model also accounts for the fact that some fraction of asymptomatic patients could also be detected due to contact tracing and other such protocols.

 Earlier this month, the mathematical modelling approach predicted that active infections in the country would peak by April 15 but this didn't come true.

 “The parameters in our model for the current phase are continuously drifting. So it is hard to get their value right,” said Agrawal.

NEW DELHI, INDIA - APRIL 22: Patients waiting outside LNJP Hospital  on April 22, 2021 in New Delhi, India. Delhi logged 26,219 fresh Covid-19 cases and 306 deaths due to the Covid on Thursday amid a growing clamour for oxygen and hospital beds in the city. The national capital's cumulative tally rose to 9,56,348 and the death toll stood at 13,193, according to health bulletin. (Photo by Amal KS/Hindustan Times via Getty Images)
NEW DELHI, INDIA - APRIL 22: Patients waiting outside LNJP Hospital on April 22, 2021 in New Delhi, India. Delhi logged 26,219 fresh Covid-19 cases and 306 deaths due to the Covid on Thursday amid a growing clamour for oxygen and hospital beds in the city. The national capital's cumulative tally rose to 9,56,348 and the death toll stood at 13,193, according to health bulletin. (Photo by Amal KS/Hindustan Times via Getty Images)

  “Even a little bit of change each day causes the peak numbers to change by several thousand,” he explained.  

The IIT Kanpur professor added that the SUTRA model’s prediction of the new peak is sensitive to the daily new infections data.

 Agrawal noted that the model uses three main parameters to predict the course of the pandemic.

  “The first is called beta, or contact rate, which measures how many people an infected person infects per day. It is related to the R0 value, which is the number of people an infected person spreads the virus to over the course of their infection,” Agrawal explained.

 The other two parameters are ‘reach’, which is a measure of the exposure level of the population to the pandemic, and ‘epsilon’ which is the ratio of detected and undetected cases.

There are other mathematical modules as well.

FARIDABAD, HARYANA, INDIA - AUGUST 13, 2020: On a monitor a graph peak shows a corona positive sample on August 13,2020 at the Translational Health Science Technology Institute in Faridabad, India. India has ramped up corona virus testing, with over 2.5 million cases and over 50,000 deaths India is fast emerging as a hub for Covid 19. India has approx. 1400 labs that do testing and has carried out approx 30 million tests. (Photo by Pallava Bagla/Corbis via Getty Images)
Image for representational purposes only.

Independent calculations by Gautam Menon and his team at Ashoka University in Haryana have predicted that the peak of the ongoing wave of infections could be between mid-April and mid-May.

 Menon also cautioned that such projections of COVID-19 cases should really be trusted only in the short term.

 “Any excessively precise prediction, of a peak within just a five-day window would ignore the many uncertainties associated with the inputs to any such calculation,” Menon, who was not involved in the modelling, had told PTI earlier. 

With inputs from PTI SAR MIN MIN MIN