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New Delhi, Apr 24: The trajectory of COVID-19 cases could have plateaued and might even fall for some weeks after the lockdown is lifted but India is likely to see a second wave in late July or August with a surge in the number of cases during the monsoon, say scientists.

The timing of the peak will depend on how India is able to control physical distancing and on the level of infection spreads after restrictions are relaxed, they said.

It looks apparent that the trajectory of daily new cases has reached a plateau and eventually it will take a downward fall, maybe for some weeks or even months, Samit Bhattacharya, associate professor at the Department of Mathematics, Shiv Nadar University, said.

Still, we may get a surge of new cases of the same coronavirus and this will be considered a second wave, Bhattacharya explained.

The second epidemic may come back in late July or August in the monsoon, although the peak timing will depend on how we control social distancing during that time, he said.

Rajesh Sundaresan, professor at Bengaluru's Indian Institute of Science (IISc), agreed.

“Once we return to normal activity levels, there is a chance that infection may begin to rise again. China is seeing this to some extent post easing of some restrictions on travel,” Sundaresan, corresponding author of a working paper by researchers at IISc and the Tata Institute of Fundamental Research (TIFR) in Mumbai, said.

On March 25, when the number of coronavirus cases was 618 with 13 deaths, the government announced a nationwide lockdown that was later extended to May 3.

On Friday, the death toll due to COVID-19 rose to 718 and the number of cases to 23,077, according to the Union Health Ministry.

In good news, officials said this week that the doubling rate of cases has slowed down in the period, going from 3.4 days before lockdown to 7.5 days, with 18 states doing better than the national average. The recovery rate has also almost doubled in the last 10 days.

"Looking at the new cases in the past few days, it seems the growth of new daily infection is much slower than earlier. This apparently indicates that we might have reached at the plateau of the growth curve, Bhattacharya said.

He noted that recent studies in China and Europe observed that the infection might relapse in those people who have already recovered from earlier phases.

So, there is no evidence that the earlier infection may help acquire immunity against the second infection. And in that way, the entire population may be vulnerable to the second wave to some extent, said the scientist.

In their study unveiled this week, IISc and TIFR researchers analysed the impact of strategies such as case isolation, home quarantine, social distancing and various post-lockdown restrictions on COVID-19 that might remain in force for some time.

The study modelled on Bengaluru and Mumbai suggests the infection is likely to have a second wave and the public health threat will remain, unless steps are taken to aggressively trace, localise, isolate the cases, and prevent influx of new infections.

The new levels and the peaking times for healthcare demand depend on the levels of infection spreads in each city at the time of relaxation of restrictions, they said.

The lockdown is currently upon us. It has given us valuable time. Let us test, trace, quarantine, isolate, practice better hygiene, search for a vaccine, etc. We should do these anyway, and these are being done. When and how to lift the lockdown is going to be a difficult decision to make, said Sundaresan.

It's clear that it's going to be phased. What our team is focusing on is to come up with tools to help the decision makers assess the public health impact of various choices, he said.

According to the experts, infectious diseases spread via contact between infectious and susceptible people. In the absence of any control measures, an outbreak will grow as long as the average number of people infected by each infectious person is more than one.

Once enough people are immune there will be fewer people susceptible to the infection and the outbreak will die.

However, when an outbreak is brought under control by social distancing and other interventions, it is possible only a small proportion of the population will have been infected and gained immunity, they said.

This means enough susceptible people may remain to fuel a second wave if controls are relaxed and infection is reintroduced.

Until the vaccine comes on the market, we have to remain alert Once sporadic cases occur here and there in the country, we immediately need to implement quarantine or social distancing locally for the people in that region, and also need to perform tests to identify positive cases irrespective of showing symptoms, Bhattacharya explained.

Note that these monsoon months are also flu season in many places of India. So, we should not ignore the early signs of the flu symptoms. Irrespective of symptoms, we need to increase tests in the hotspots to identify people and contain the surge, he said.

Sundaresan added that the timeline for a second wave will depend on a lot of circumstances which may change as the time passes.

Significant testing may have been underway, there may be behavioural changes with people becoming more careful about their hygiene, wearing masks may become more common, etc. All these responses may help restrict the second wave, he said.

A study published in The Lancet journal earlier this month modelled the potential adverse consequences of premature relaxation of interventions, and found it might lead to a second wave of infections.

The finding is critical to governments globally, because it warns against premature relaxation of strict interventions, the researchers said.

While interventions to control the spread of SARS-CoV-2 are in place, countries will need to work toward returning to normalcy; thus, knowledge of the effect of each intervention is urgently required, they said in the study.

According to a recent analysis by the Harvard Chan School of Public Health, the best strategy to ease the critical care burden and loss of life from COVID-19 might be on-again, off-again social distancing.

In the absence of such interventions, surveillance and intermittent distancing may need to be maintained into 2022, which would present a substantial social and economic burden, the researchers wrote.p

New Delhi, Apr 26: Medical services at Babu Jagjivan Ram Hospital in Jahangirpuri area have been closed and the hospital is being sanitised after 44 staff members including doctors were tested positive for COVID-19, Delhi Health Department said on Saturday.

"Total 44 staff members including doctors at Babu Jagjivan Ram Hospital in Jahangirpuri area of Delhi have tested positive for COVID-19. Test reports of other staff members are awaited. Hospital's medical services have been closed and the hospital is being sanitized," Delhi Health Department said.

Earlier today, Delhi Health Minister Satyendar Jain informed that there are 2,625 coronavirus cases in Delhi, out of which 111 were reported yesterday.

The total number of active cases in the national capital stands at 1,518 while 869 people have recovered so far, the minister further informed. There have been 54 deaths in the national capital, as per the Union Health Ministry.

A total of 26,496 confirmed cases of COVID-19 have been reported in India, including 19,868 active cases, the Ministry of Health and Family Welfare said on Sunday.

824 people have lost their lives due to the infection in the country.

New Delhi, Feb 11: Cheaper lending rates in the country along with the government's booster via tax cuts seem to have had little effect on vehicle sales in January, with car sales decreasing by over 14,531 units, or slightly over 8 per cent, compared to January last year.

According to Rajan Wadhera, President of industry body Society of Indian Automobile Manufacturers (SIAM), which gives out the auto sales numbers, the overall slump in vehicle sales in India was due to the "rising cost of vehicle ownership and slower growth in GDP".

Barring three-wheelers, all other segments showed de-growth.

Vehicle sales across segments have been declining for over a year now. SIAM sales data last month compared with that of January 2019 showed that domestic passenger vehicle sales slipped 6.2 per cent to 262,714 units. The decline in car sales stood at 8.1 per cent, and two-wheelers 16.06 per cent.

Sales of commercial vehicles, an indicator of industrial health in the economy, slipped by 14.04 per cent to 75,289 units last month, while the vehicle sales across categories registered a de-growth of 13.83 per cent to 17,39,975 units from 20,19,253 units in January 2019, SIAM said.

However, Wadhera said, they were hopeful that recent government announcements on infrastructure and rural economy would support growth of vehicle sales, especially in the commercial and two-wheeler segments.

"We are looking forward to the early announcement of an incentive-based scrappage policy in the context of the recent assurances by the government," Wadhera said.