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Amid the rapid spread of the novel coronavirus (COVID-19), which has infected 73 people in India and killed more than 4,500 individuals globally, doctors have advised that in addition to regularly washing hands, one should also disinfect their smartphone every 90 minutes with alcohol-based hand sanitizer.

Ravi Shekhar Jha, Head of Department at Fortis Escorts Hospital in Faridabad said the best method to disinfect your smartphone is to use regular doctor spirit or the alcohol-based hand sanitizer at least every 90 minutes.

"Avoid touching your eyes, mouth, or nose. The best option is to use a phone cover or a Bluetooth device and try to touch your phone as less as possible. We would also recommend cleaning your phone at least twice a day," Jha told IANS.

According to research, published in 2018 by Insurance2Go, a gadget insurance provider, revealed that smartphone screens have three times more germs than a toilet seat.

One in 20 smartphone users was found to clean their phones less than every six months, said the study.

"In the time of fear of coronavirus, smartphones should also be disinfected with alcohol-based sanitizer rub. Pour few drops of sanitizer on a tiny clean cotton pad and rub it safely on your entire phone," said Jyoti Mutta, Senior Consultant, Microbiology, Sri Balaji Action Medical Institute in New Delhi.

"You can repeat this process every evening coming back home after an entire day out at work and once in the morning before going out," Mutta added.

"Maintain basic cleanliness, and try to avoid using other's phones especially if suffering from respiratory illness or flu-like symptoms as there is no other way to disinfect these regular gadgets," she stressed.

Another study from the University of Surrey in the UK, also found that the home button on your smartphone may be harbouring millions of bacteria - some even harmful.

The World Health Organisation (WHO) declared the novel coronavirus as a global pandemic on Wednesday. The death toll of COVID-19 has crossed the 4,500 marks and confirmed cases globally have touched one lakh as per the reports.

According to Suranjeet Chatterjee, Senior Consultant in Internal Medicine Department of Indraprastha Apollo Hospitals in New Delhi, "We should frequently wash our hands, cover our coughs and it is important to adapt to other good hygiene habits that are most important in such a situation."

"Coronavirus and other germs can live on surfaces like glass, metal or plastics and phones are bacteria-ridden. It is necessary that we sanitize our hands frequently and make sure that our hands are clean all the time," Chatterjee told IANS.

"The emphasis should be laid on sanitising our hands rather than sanitizing the phone - once in a while the phone can be sanitized under the guidance of the makers of the phone," Chatterjee stressed.

According to the global health agency, the most effective way to protect yourself against coronavirus is by frequently cleaning of your hands with alcohol-based hand rub or washing them with soap and water.

The WHO's report showed the virus infects people of all ages, among which older people and those with underlying medical conditions are at a higher risk of getting infected.

People should eat only well-cooked food, avoid spitting in public, and avoid close contact, the WHO said, adding that it is important for people to seek medical care at the earliest if they become sick.

New Delhi, Apr 9: The Delhi Police has traced Tablighi Jamaat leader Maulana Saad Kandhalvi, who has been on the run after an FIR was registered against him for organising a religious gathering last month despite restrictions to combat the coronavirus, sources said on Wednesday.

The cleric has been traced to Zakir Nagar in southeast Delhi, sources said.

His lawyer Tauseef Khan, however, said Saad is under self-quarantine and will join investigation after his quarantine period is over.

On March 31, Delhi Police's Crime Branch lodged an FIR against seven people, including the cleric, on a complaint by Station House Officer Nizamuddin for holding the congregation here allegedly in violation of the orders against large gathering and not maintaining social distancing to contain the spread of coronavirus.

A day later, the Delhi Police's Crime Branch wrote to Saad and others, seeking the details under Section 91 of the Code of Criminal Procedure. A second notice was also issued to him this week.

"Saad is currently under self-quarantine and will join investigation once the period of 14 days gets over," his advocate, Tauseef Khan, told PTI.

Saad's quarantine is expected to end next week.

His lawyer said a reply to the second notice will be given soon.

In an audio message last week, Saad said he was exercising self-quarantine after several hundreds who visited the Tablighi Jamaat's Nizamudddin markaz tested positive for coronavirus.

Visited by thousands last month, the Nizamudddin centre also turned out to be a hotspot for spread of coronavirus not only in national capital and country.

According to the FIR, the Delhi Police contacted the centre on March 21 and reminded them of the government order that prohibited any political or religious gathering of more than 50 people.

However, no one paid any heed to the police's direction, it said. Moreover, an audio recording purportedly of Saad was found in circulation on WhatsApp on March 21, in which he was heard asking his followers to defy the lockdown and social distancing and to attend the religious gathering of the Markaz.

On March 24, the government ordered 21-day nationwide lockdown and restricted any social, political or religious gathering.

The same day a meeting was held at Hazarat Nizamuddin police station between SHO and officer bearers of the centre.

The meeting was attended by Saad, Mohammad Ashraf, Mohammad Salman, Yunus, Mursaleen Saifi, Jishan and Mufti Shehzad and they were informed about lockdown orders.

So far, several hundred cases of COVID-19 cases across the country have been found to be linked to the Tablighi Jamaat congregation held in Delhi last month.

More than 25,500 Tablighi members and their contacts have been quarantined in the country after the Centre and the state governments conducted a "mega operation" to identify them.

At least 9,000 people participated in the religious congregation in Nizamuddin. Later, many of the attendees travelled to various parts of the country.

The current physical distancing guidelines provided by the World Health Organisation (WHO) and by the US Centers for Disease Control and Prevention (CDC) may not be adequate to curb the coronavirus spread, according to a research which says the gas cloud from a cough or sneeze may help virus particles travel up to 8 metres. The research, published in the Journal of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.

Study author, MIT associate professor Lydia Bourouiba, warned that droplets of all sizes can travel 23 to 27 feet, or 7-8 metres, carrying the pathogen.

According to Bourouiba, the current guidelines are based on "arbitrary" assumptions of droplet size, "overly simplified", and "may limit the effectiveness of the proposed interventions" against the deadly pandemic.

 She explained that the old guidelines assume droplets to be one of two categories, small or large, taking short-range semi-ballistic trajectories when a person exhales, coughs, or sneezes.

However based on more recent discoveries, the MIT scientist said, sneezes and coughs are made of a puff cloud that carries ambient air, transporting within it clusters of droplets of a wide range of sizes.

Bourouiba warned that this puff cloud, with ambient air entrapped in it, can offer the droplets moisture and warmth that can prevent it from evaporation in the outer environment.

"The locally moist and warm atmosphere within the turbulent gas cloud allows the contained droplets to evade evaporation for much longer than occurs with isolated droplets," she said.

"Under these conditions, the lifetime of a droplet could be considerably extended by a factor of up to 1000, from a fraction of a second to minutes," the researcher explained in the study.

The MIT scientist, who has researched the dynamics of coughs and sneezes for years, added that these droplets settle along the trajectory of a cough or sneeze contaminating surfaces, with their residues staying suspended in the air for hours.

"Even when maximum containment policies were enforced, the rapid international spread of COVID-19 suggests that using arbitrary droplet size cutoffs may not accurately reflect what actually occurs with respiratory emissions, possibly contributing to the ineffectiveness of some procedures used to limit the spread of respiratory disease," Bourouiba wrote in the study