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UN, May 26: Countries could see a "second peak" of coronavirus cases during the first wave of the pandemic if lockdown restrictions were lifted too soon, the World Health Organization (WHO) has warned.

Mike Ryan, the WHO's head of emergencies, told a briefing on Monday that the world was "right in the middle of the first wave", the BBC reported.

He said because the disease was "still on the way up", countries need to be aware that "the disease can jump up at any time".

"We cannot make assumptions that just because the disease is on the way down now that it's going to keep going down," Ryan said.

There would be a number of months to prepare for a second peak, he added.

The stark warning comes as countries around the world start to gradually ease lockdown restrictions, allowing shops to reopen and larger groups of people to gather.

Experts have said that without a vaccine to give people immunity, infections could increase again when social-distancing measures are relaxed.

Ryan said countries where cases are declining should be using this time to develop effective trace-and-test regimes to "ensure that we continue on a downwards trajectory and we don't have an immediate second peak".

Also on Monday, Tedros Adhanom Ghebreyesus, WHO Director-General, said that a clinical trial of hydroxychloroquine (HCQ) on COVID-19 patients has come to "a temporary pause", while the safety data of the the anti-malaria drug was being reviewed.

According to the WHO chief, The Lancet medical journal on May 22 had published an observational study on HCQ and chloroquine and its effects on COVID-19 patients that have been hospitalized, reports Xinhua news agency.

The authors of the study reported that among patients receiving the drug, when used alone or with a macrolide, they estimated a higher mortality rate.

"The Executive Group of the Solidarity Trial, representing 10 of the participating countries, met on Saturday (May 23) and has agreed to review a comprehensive analysis and critical appraisal of all evidence available globally," Tedros said in a virtual press conference.

The developments come as the total number of global COVID-19 cases has increased to 5,508,904, with 346,508 deaths, according to the Johns Hopkins University.

New Delhi, Jun 13: About 56 per cent of children were found to have no access to smartphones which have emerged as essential tools for online learning during the coronavirus-induced lockdown, according to a new study that surveyed 42,831 students at various school levels.

The study ''Scenario amidst COVID 19 - Onground Situations and Possible Solutions'' was conducted by child rights NGO Smile Foundation with an aim of analysing the access to technology.

The findings of the study showed that 43.99 per cent of surveyed children have access to smartphones and another 43.99 per cent of students have access to basic phones while 12.02 per cent do not have access to either smartphones or basic phones.

A total of 56.01 per cent children were found to have no access to smartphones, the study said.

"Concerning television, it was noted that while 68.99 per cent have access to TV, a major chunk of 31.01 per cent does not. Hence suggesting that using smartphone interventions for enhancing learning outcomes is not the only solution," it said.

At the primary level of education (class 1 to 5) 19,576 children were surveyed while at upper primary level (class 6 to 8) 12,277 children were surveyed. At secondary level of education (class 9 to 10) 5,537 children were surveyed and at higher secondary level (class 11 to 12) 3,216 children were surveyed.

The survey based on which the study was conducted used two approaches - over the telephone wherein the NGO reached out to the children whose database it already had -- students enrolled in various education centres of the NGO -- and second was through community mobilization wherein community workers went door to door to get answers.

The survey was conducted in 23 states, including Delhi, Gujarat, Maharashtra, Karnataka, Tamil Nadu, West Bengal, Andhra Pradesh, Telangana, Uttar Pradesh, Haryana, over a period of 12 days from April 16 to April 28.

The lockdown induced by the COVID-19 pandemic in March prompted schools and colleges to move to the virtual world for teaching and learning activities. However, many experts say the digital divide in the country may turn online classes into an operational nightmare.

As per official statistics, there are over 35 crore students in the country. However, it is not clear as to how many of them have access to digital devices and Internet.

Santanu Mishra, co-founder and executive trustee, Smile Foundation, said the findings clearly show that the digital divide is a real challenge, and multiple approaches need to be implemented to cater to all across the nation.

"As an exercise before we start any programme, we do a baseline study to understand the on-ground challenges so that our programmes can bring in real work and real change. With the onset of the pandemic, following indefinite school closures, it is more important than ever to understand the situation and how can we ensure that children are given quality education. Through this, we understand that customized modules need to be built in accordance with the channel of communication," he said.  

New Delhi, Jul 18: The Covid-19 lockdown-led reduction in air pollution levels across five Indian cities, including Delhi and Mumbai, may have prevented about 630 premature deaths, and saved USD 690 million in health costs in the country, according to a new study.

Scientists, including those from the University of Surrey in the UK, assessed the levels of harmful fine particulate matter (PM2.5) from vehicles and other sources in five Indian cities -- Delhi, Mumbai, Kolkata, Chennai and Hyderabad -- since the beginning of the lockdown period.

The study, published in the journal Sustainable Cities and Society, compared these lockdown PM2.5 figures from 25 March up until 11 May, with those from similar periods of the preceding five years, and found that the measure reduced pollution levels in all these places.

According to the scientists, during this period, the levels of these harmful air pollutants reduced by 10 per cent in Mumbai, and by up to 54 per cent in Delhi.

"The percentage reduction for the other cities ranged from 24 to 32 per cent, which was slightly smaller than the measured values for Delhi and Mumbai," the scientists noted in the study.

"While the reduction in PM2.5 pollution may not be surprising, the size of the reduction should make us all take notice of the impact we have been having on the planet," said Prashant Kumar, a co-author of the study from the University of Surrey.

The scientists said these reductions in PM2.5 were comparable to those reported in other cities across the world, such as in Austria's capital Vienna (60 per cent), and Shanghai (42 per cent) in China.

They also calculated the monetary value of the reduced mortality due to air pollution and found that the lowered levels of PM2.5 may have saved 630 people from premature death, and USD 690 million in health costs in India.

Coronavirus India update: State-wise total number of confirmed cases, deaths on July 17

According to the researchers, the present lockdown situation offers observational opportunities regarding potential control systems and regulations for improved urban air quality.

They said an integrated approach might help in understanding the overall impacts of Covid-19 lockdown-style interventions and support the implementation of relevant policy frameworks.

"This is an opportunity for us all to discuss and debate what the 'new normal' should look like - particularly when it comes to the quality of the air we breathe," Kumar said.