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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.

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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.

New Delhi, May 15: A group of doctors from the AIIMS, Raipur has recommended restrictions on the use of mobile phones in healthcare institutions amid the COVID-19 pandemic, warning that such devices can be a potential carrier of the virus and lead to infection among healthcare workers.

In a commentary published in the BMJ Global Health journal, the doctors stated that mobile phone surfaces are a peculiar 'high-risk' surface, which can directly come in contact with the face or mouth, even if hands are properly washed and one study indicates that some healthcare workers use phones every 15 minutes to two hours.

Though there have been many significant guidelines from various health organisations like the WHO and CDC focusing on prevention and control of disease, the commentary highlighted "there is no mention of or focus on mobile phones in these guidelines, including the WHO infection control and prevention guidelines, which recommends the use of handwashing".

In healthcare facilities, phones are used to communicate with other health care workers, look up recent medical guidelines, research drug interactions, understand adverse events and side effects, conduct telemedicine appointments and track patients among others, stated the document.

The document has been authored by Dr Vineet Kumar Pathak, Dr Sunil Kumar Panigrahi, Dr M Mohan Kumar, Dr Utsav Raj and Dr Karpaga Priya P from the Department of Community and Family Medicine.

"In their tendency to come in direct contact with the face, nose or eyes in healthcare settings, mobile phones are perhaps second only to masks, caps or goggles," the authors said.

"However, they are neither disposable nor washable like these other three, thus warranting disinfection. Mobile phones can effectively negate hand hygiene... There is growing evidence that mobile phones are a potential vector for pathogenic organisms," they said.

It is the need of the hour to address proper hygienic use of mobile phones in healthcare settings. In a study in India, almost 100 per cent of health workers of a tertiary care hospital used mobile phones in the hospital, but only 10 per cent of them had at any time wiped their mobile phones clean, the commentary published on April 22 said.

"The safest thing to do is to consider your phone as an extension of your hand, so remember you are transferring whatever is on your phone to your hand," Dr Pathak said.

Amidst the ongoing pandemic, two biggest mobile phone companies have uploaded their user support guidelines, saying that 70 pc isopropyl alcohol or Clorox Disinfecting Wipes can be used to gently wipe the exterior surface of phones in switched-off mode.

However, in doing so, the use of bleach or entry of moisture through any of the openings must be avoided, and any harsh chemical may damage the oleophobic screen, leading to damage in the touch screen sensitivity of the phone, the article stated.

Mobile phones are one of the most highly touched surfaces according to the Centers for Disease Control and Prevention (CDC), along with counters, tabletops, doorknobs, bathroom fixtures, toilets, keyboards, tablets and bedside tables.

The doctors recommended restriction on mobile phone usage in healthcare settings like hospital wards, ICUs and operation theatres, while advocating the use of headphones to prevent contact with the face while talking.

There should be no sharing of mobile phones, headphones or headsets of any kind. In addition, where available, the use of interdepartmental intercom facility may be promoted.

"Although hand hygiene and mobile phone use by a person are not mutually exclusive, it is high time to acknowledge the potential role of mobile phones in disease transmission cascade and to take evidence-based appropriate actions. This is especially important, given the ongoing COVID-19 pandemic," the authors said.

They said it is necessary for government agencies and the WHO to generate public awareness and to formulate suitable information, education and communication material on mobile phone hygiene, especially in healthcare settings.

AIIMS, New Delhi, Resident Doctors' Association (RDA) General Secretary, Dr Srinivas Rajkumar T said even outside health care settings, people should pay special attention to the usage of mobile phones as they carry them to all places.

"Phone and computer peripherals like keyboard, mouse, etc. should be covered with transparent plastic covers which can be cleaned without interfering with their function. Cleaning hands by soap or alcohol-based hand sanitizer before and after contact with phone and between contact with other surfaces can decrease the risk of potential transmission.

"Using a handsfree headset, dedicated operator/assistant per ward handling the communication via common line in hospitals while on duty can enable communication without compromising safety," Dr Srinivas said.

New Delhi, May 30: An Air India flight from Delhi to Moscow on Saturday had to return midway after the airline's ground team found out that one of the pilots had tested positive for novel coronavirus, officials said.

"When the A320 plane, which did not have any passengers as it was heading to Moscow to bring back stranded Indians under Vande Bharat Mission, had reached Uzbekistan's airspace, our team on ground realised that one of the pilots had tested COVID-positive," senior Air India officials said.

"The flight was immediately asked to return. It came back to Delhi at around 12.30 pm on Saturday," the officials said. The crew has been quarantined. Another plane would be sent to Moscow to bring back the stranded Indians, according to the officials.