Good news for ‘fake news’ journalists: Ministry withdraws guidelines after Modi’s intervention

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Bengaluru, Mar 15: Amid growing coronavirus cases, the Karnataka government on Sunday postponed examinations of class 7, 8 and 9 till March 31, 2020.

The revised dates for examinations will be announced after reviewing the situation. The directive was issued by state education minister S Suresh Kumar on Sunday morning.

On Friday, the government had shut all educational institutions, malls, and clubs for a week.

Chief Minister BS Yediyurappa had said no one should travel unless it is an emergency.

"All malls, cinema halls, pubs, wedding ceremonies and other large gatherings in the Karnataka have been banned for another one week," Chief Minister Yediyurappa had said.

Notably, the number of coronavirus cases in the country has risen to 93, informed the Union Ministry of Health and Family Welfare today.

So far, two deaths due to the COVID-19 have been reported in the country. In the wake of spurt in cases of coronavirus across the country, the Central Government on Saturday decided to treat the deadly virus as a "notified disaster".

Coronavirus, which originated in China's Wuhan city in December last year, has so far spread to more than 100 countries, infecting over 1,30,000 people. The World Health Organisation (WHO) has declared coronavirus a pandemic.

Bengaluru, Jun 26: Karnataka recorded 445 new Covid cases, majority of whom were contacts of earlier positive cases, breaching the 11,000 mark to settle at 11,005, an official said on Friday.

"New cases reported from Thursday 5 p.m. to Friday 5 p.m., 445," said a health official on Friday.

In the past 24 hours, 10 patients succumbed to the virus in Karnataka, three in Bengaluru Urban and one each in Kolar, Dharwad, Shivamogga, Bagalkote, Bidar, Kalaburagi and Ballari.

Like everyday, contacts of earlier cases outnumbered domestic returnees in the number of infections, constituting 39 per cent.

Positive cases with domestic travel history numbered 65, a mere 15 per cent and majority to Maharashtra.

There were also 21 cases with international travel history to countries like Oman, Qatar, Saudi Arabia and Dubai.

On Friday, cases spiked in Bengaluru Urban, Ballari, Kalaburagi, Koppal, Dakshina Kannada, Dharwad, Raichur, Gadag, Chamarajanagar, Udupi, Yadgir, Mandya, Uttara Kannada, Bagalkote, Shivamogga, Kolar and Mysuru.

Among the new cases, Bengaluru Urban accounted for 144, followed by Ballari (47), Kalaburagi (42), Koppal (36), Dakshina Kannada (33), Dharwad (30), Raichur (14), Gadag (12), Chamarajanagar (11), Udupi (9), Yadgir (7), Mandya, Uttara Kannada, Bagalkote, Shivamogga and Kolar (6 each).

Mysuru (5), Chikkamagaluru and Kodagu (4 each), Hassan and Bengaluru Rural (3 each), Vijayapura, Tumkur and Haveri (2 each) and Bidar, Belagavi, Davangere, Ramanagara and Chitradurga (1 each).

As many 144 patients are suffering from Influenza-like Illness (ILI) and 19 from Severe Acute Respiratory Infection (SARI).

In all, 5.68 lakh samples have been tested so far, of which 5.41 lakh tested negative.

Meanwhile, 178 patients are admitted in the ICU.

Of the total 180 deaths, Bengaluru Urban has accounted for 81, followed by Bidar (16), Kalaburagi (15), Ballari (9) and Dakshina Kannada (8), among others.