Decentralisation key word for development says Magsaysay award winner Harish Hande

Bengaluru, Apr 18: The Karnataka government has managed to get the contact details of nine out of 10 foreign nationals who had visited Jubilant Life Sciences, a pharmaceutical company in Mysuru district's Nanjangud which has been declared a coronavirus hotspot, State minister S Suresh Kumar said on Saturday.

As many as 66 people have tested positive for COVID-19 in Nanjangud.

While investigating the source of virus in what is now known as 'Nanjangud cluster', the Mysuru administration could get information that 10 foreign nationals had visited this town, Kumar told reporters.

Soon the External Affairs Ministry's help was sought which managed to track nine of them, Kumar said, adding that the MEA contacted its embassies in China, Germany, Japan and the USA to track these persons.

"Out of 10, they could contact nine and got details. All of them have said that they were all healthy and they did not have any symptoms.

Hence, they did not feel the need to undergo COVID-19 tests," the minister said.

He opined that many people do not show the symptoms but they could be carriers of the virus.

Coronavirus India update: State-wise total number of confirmed cases, deaths on April 18

"It all depends on the person's immunity," Kumar explained.

A foreign national from Germany who had visited Nanjangud could not be reached as her contact details were not available.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Kasaragod, Apr 10: The death of five cats in the general hospital-turned-Covid-19 isolation centre here recently has evoked a little bit of scare among the health authorities who are eagerly awaiting the viscera test results of the dead animals.

The death of the cats has evoked anxiety in the backdrop of a tiger in a zoo in United States tested positive for Covid-19 recently.

It was recently that the hospital authorities had noticed the death of the cats, which include two male and a female adult and two kittens, were long been seen in and around the hospital compound.