Hindu-Muslim wedding: Communal groups call for bandh; several booked

Bengaluru, Mar 3: Karnataka Health Minister B Sriramulu has called a meeting of top officials of his department on Tuesday following information that the man, who tested postive for novel coronavirus in Telangana had travelled from the city.

The minister in a tweet said people residing in the person's local address have been identified and are being monitored.

He also said state government has taken all precautionary measures to contain the spread of the virus.

The condition of the 24-year-old man, who tested positive for the coronavirus was stable and he was being treated in an isolated ward at the state-run Gandhi hospital in Hyderabad, the Telangana government had said on Monday.

The man, a software engineer who works here, had been to Dubai last month on an official visit, where he is suspected to have contracted the virus.

The man reached Bengaluru on February 19/20 and later travelled to Hyderabad in a bus.

Earlier, Sriramulu had said, the government has strengthened all surveillance and control measures against the spread of the virus in Karnataka.

Till date, 468 travellers from COVID 2019 affected countries have been identified and 284 are under home isolation while one admitted in selected isolation hospital, he had said.

The Karnataka Minister had also said that till date samples of symptomatic are sent for testing, out of which 240 samples were eligible for testing and 238 were reported as negative.

He added that 104 'arogya sahayavani' (health helpline) has reserved 2 seater for receiving calls and providing guidance over Coronavirus and 6,770 calls have been received and information provided.

Bengaluru, Mar 24: Eight new positive coronavirus cases were confirmed in Karnataka on Tuesday, taking the tally to 41 in the state, the health department said.

"Till date 41 COVID-19 positive cases have been confirmed in the state which includes one death and 3 discharged," the department said.

According the department bulletin, 37 positive patients are in isolation at designated hospitals and their condition is stable.

Of the 41 confirmed cases, six are transit passengers hailing from Kerala who have landed in airports and being treated in Karnataka.

Among the eight passengers confirmed on Tuesday also three men and a woman are from Kasaragod in Kerala with a history of travel to Dubai and Saudi Arabia respectively.

All the four had landed in Mangaluru, where they are being treated.

The others are: two men, aged 40 and 65, from Uttara Kannada district in Karnataka with travel history to Dubai;

a 56-year-old woman, a resident of Chikkaballapura district, who is a family member and co-passenger of person who tested postive with travel history to Mecca, and a 56-year-old woman, resident of Bengaluru, a contact of another person who has tested positive for the virus,

Among the 41 cases, 24 has been reported from Bengaluru, five from Dakshina Kannada, three each from Kalaburgai and Chikkaballapura, two each from Mysuru and Uttara Kannada, and one each from Kodagu and Dharwad.

All the three discharged patients are from Bengaluru, while one death was reported in Kalaburagi earlier this month, which was the country's first COVID-19 related death.

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