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Bengaluru, Apr 16: With two more people testing positive for COVID-19 in Karnataka, the state's corona cases count has reached 279, including 80 discharged and 12 deaths, said the government on Wednesday.

A total of 19 corona cases were confirmed in the state on Wednesday. 17 cases were reported earlier in the day, of which 15 are male patients and two are female. Of the 17 cases, nine are workers of a pharmaceutical company in Mysuru, the government stated.

Meanwhile, a 65-year-old from Chikkaballapur, who had tested positive for COVID-19, lost his life this afternoon.

"He was referred to a Bengaluru hospital with complaints of H1N1 positive, chronic obstructive pulmonary disease with obstructive sleep apnea and a past history of diabetes and hypertension," the government said.

Thrissur, Feb 2: The Kerala government on Saturday said the condition of the medical student, kept in an isolation ward in Thrissur after testing positive for the novel coronavirus is satisfactory and that three people have been arrested for spreading false information on social media about the disease.

The woman, who tested positive, is a student of Wuhan university and is undergoing treatment at the Thrissur Medical College Hospital.

"The health status of the student who tested positive for coronavirus remains satisfactory.

The hospital authorities have confirmed that the health condition of all symptomatic persons under isolation in hospitals are "stable", a bulletin said.

Health Minister K K Shailaja said Kerala has strengthened surveillance and control measures against the epidemic, which has been declared by WHO as a global emergency,

She told reporters here that three people have been arrested for spreading false information about those who had arrived in the state from coronavirusa affected countries and are under home surveillance.

Six others had forwarded the posts and the cyber cell was probing the matter, Shailaja said.

The minister had earlier warned that strong action would be taken against those putting out false news on the disease.

Police said Sabari was arrested on Friday and released on bail, while two others-- Shafi and Siraj were arrested on Saturday.

Two cases have been registered in two police stations in Thrissur in this connection, they said.

A medical bulletin said that till date, 1793 people who travelled from coronavirus affected countries have been identified and placed under surveillance.

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