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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

Mumbai, Jan 9: India's weddings are famously lavish -- lasting days and with hundreds if not thousands of guests -- but this season many families are cutting costs even if it risks their social standing.

It is symptomatic of a sharp slowdown in the world's fifth-largest economy, with Indians spending less on everything from daily essentials to once-in-a-lifetime celebrations.

Growth has hit a six-year low and unemployment a four-decade high under Prime Minister Narendra Modi. Prices are rising too, squeezing spending on everything from shampoo to mobile data.

Chartered accountant Palak Panchamiya, for example, has already slashed the budget on her upcoming Mumbai nuptials by a third, trimming spending on clothing and the guest list.

"Initially I chose a dress that cost 73,000 rupees ($1,000)," Panchamiya told news agency as she picked through outfits at a recent marriage trade fair.

"But my partner felt it was too expensive, and so now I am here reworking my options and looking for something cheaper."

India's massive wedding industry is worth an estimated $40-50 billion a year, according to research firm KPMG.

The celebrations can last a week and involve several functions, a dazzling variety of cuisines, music and dance performances, and lots of gifts.

Foreigners can even buy tickets to some events.

But these days, except for the super-rich -- a recent Ambani family wedding reportedly cost $100 million -- extravagance is out and frugality is in as families prioritise saving.

"Earlier Indian weddings were like huge concerts, but now things have changed," said Maninder Sethi, founder of Wedding Asia, which organises marriage fairs around the country.

Cracks emerged in 2016 when the Indian wedding season, which runs from September to mid-January, was hit by the government's shock withdrawal of vast amounts of banknotes from circulation in a bid to crack down on undeclared earnings.

Mumbai-based trousseau maker Sapna Designs Studio shut for months as the economy was turned on its head by Modi's move.

"No exhibitions were happening and there were no avenues for us to sell either," said Vishal Hariyani, owner of the clothing studio.

Hopes for a recovery proved short-lived when the cash ban was followed by a botched rollout of a nationwide goods and services tax (GST) in 2017 that saw many small-scale businesses close.

Since then, keeping his studio afloat has been a challenge, with consumers increasingly reluctant to spend too much, says Hariyani.

"We customise our clothes as per their budgets, and now week-long weddings have been converted to just a 36-hour ceremony," he told news agency.

"We have to pay GST, pay workers and even offer discounts to customers," he added.

"The whole economy has slowed down and reduced spending on weddings is a by-product of that. Everyone except the super-rich are affected," Pradip Shah from IndAsia Fund Advisors told news agency.

"It is reflective of how sombre the mood is," he said.

In a country where families traditionally spend heavily on weddings -- including taking on debt in some cases -- the downturn is also a source of sadness and shame, with elaborate celebrations often seen as a measure of social status.

"We haven't even invited our neighbours. It is embarrassing but the current situation doesn't offer us much respite," 52-year-old Tara Shetty said ahead of her son's wedding.

"In my era, we always spent a lot and had thousands of people attending the weddings," she explained.

"My wedding was supremely grand, and now my son's is the polar opposite."