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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, Feb 18: A group of citizens on Tuesday demanded a thorough inquiry into the death of special CBI judge Brijgopal Harkishan Loya in 2014.

The group has written a letter to Maharashtra Chief Minister Uddhav Thackeray, seeking a time-bound probe into the death of Loya.

Loya, who was hearing the high-profile Sohrabuddin Sheikh fake encounter case of Gujarat, died of a cardiac arrest in Nagpur on December 1, 2014, when he had gone to attend the wedding of a colleague's daughter.

Social activist Ashok Pai, addressing a press conference on behalf of the group, also demanded proper compensation for the judge's family, saying he was on an "official" tour.

Pai said on Tuesday he met NCP president Sharad Pawar, whose party is a key constituent of the Maha Vikas Aghadi (MVA) government in Maharashtra, and raised these demands with him.

Pawar assured to look into the demands, he said at the press conference at the Mumbai Marathi Patrakar Sangh.

"We have handed over a letter to Maharashtra Assembly speaker Nana Patole and dispatched a copy of the letter to Chief Minister Uddhav Thackeray (seeking a probe into Loya's death)," Pai said.

As the matter relates to "mysterious" death of a sitting judge of the CBI, all facts about it must be made public after a detailed and time-bound probe, Pai said.

The Loya death case had reached the Supreme Court.

The Supreme Court had held that Loya had died of "natural causes" and had rejected PILs seeking an SIT probe into the death, questioning their motive.

The SC had held that petitions were moved by political rivals to settle scores which was a serious attempt to scandalise the judiciary and obstruct the course of justice through a "frontal attack" on its independence.

New Delhi, Feb 9: Calling India a "long-standing friend", Sri Lankan Prime Minister Mahinda Rajapaksa on Saturday thanked Prime Minister Narendra Modi for visiting his country in the aftermath of last year's Easter Sunday terror attacks and outlined that New Delhi has always helped Colombo in its fight against terrorism.

In a joint press briefing with PM Modi, Mahinda Rajapaksa said he hopes that India will continue to help Sri Lanka fight terrorism.

Mahinda Rajapaksa expressed his gratitude to PM Modi for the neighbourhood first policy and the priority India gives to Sri Lanka.

"We had agreed that our cooperation is multifaceted and priority is given to a number of areas including security, economy, culture and social sectors. Part of our discussions centered on cooperation with regard to the security of the two countries. India has always assisted Sri Lanka to enhance our capacity, capabilities in intelligence and counter-terrorism. We look forward to getting continued support in this regard," he said.

"I thank the Prime Minister for visiting Sri Lanka in the aftermath of the Easter Sunday terror attacks that provided us with immense strength to come to terms with the tragedy. We also appreciate Prime Minister Modi's $400 million line of credit to enhance the economy of Sri Lanka and another $50 million line of credit for fighting terrorism," he added.

The Sri Lankan president urged PM Modi to consider further assistance to expand housing projectS all over Sri Lanka to benefit people from rural areas.

"The Prime Minister and I discussed how Sri Lanka and India can work together in the field of economy. India is among the world's fastest growing economies. I discussed with PM Modi how Sri Lanka could benefit from certain economic sectors where India is in a strong position," he said.

Concluding his statement, Mahinda Rajapaksa said, "India is our closest neighbour and a long-standing friend. The close historical links...provided a solid foundation to our ties."