PFI, SDPI will be banned; party hopper MLAs who joined BJP will be awarded: K S Eshwarappa

New Delhi, May 3: The Indian Council of Medical Research (ICMR) has crossed over one million RT-PCR tests for COVID-19 on Saturday evening marking a big landmark, ICMR officials said.

"We have tested about 10,40000 tests till Saturday evening. In a few days, we have increased our testing capacity. ICMR has been doing more than 70,000 tests in the last two consecutive days," he said.

On Saturday, ICMR released that a total of 976363 samples have been tested till date. From May 1 till evening on Saturday, 1,37,346 tests were done.

The top three states which are doing vigorous testing includes--Maharashtra, Tamil Nadu and Rajasthan. As on date, these three states have conducted more than one lakh test respectively.

However, Andhra Pradesh, Uttar Pradesh, Karnataka and Delhi still need to ramp up their testing capacity.

ICMR has always emphasised that the confirmatory test for diagnosis of COVID-19 infection is RT-PCR test of the throat and/or nasal swab, which detects virus at an early stage. Recently, Dr GS Toteja, Additional Director General of ICMR had said that to contain coronavirus infection, RT-PCR tests must be continued vigorously as the principal diagnostic tests.

RT-PCR tests are now available in 310 government laboratories and 111 private set up across the country.

On Friday, the Centre informed that ICMR has ordered 21.35 lakh diagnostic kits. As on date, India has reported about 37,776 confirmed coronavirus cases and 1223 deaths.

Mangaluru, Jan 20: A teenage girl drowned after a boat in which she was traveling in capsized in the river Netravati at Uliya Hoige, Ullal, police said on Monday.

Meanwhile, four other girls who were also traveling on the same boat were rescued by the locals, the police added. The mishap happened on Sunday.

The deceased has been identified as 18-year-old Renita, a resident of Miyapadavu.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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