Dakshina Kannada Youth Congress chief Mithun Rai tests covid positive

Bengaluru, May 5: Karnataka Chief Minister BS Yediyurappa on Tuesday said that the coronavirus situation in the state is "under control" as compared to several other states in the country.

He also hinted that soon the construction and industrial activities would be allowed in the state except in the red zones.

"Coronavirus situation in the state is under control as compared to other states. Due to this, travel of migrant workers was prohibited. Now, trade, construction and industrial activities need to restart, except in the red zones," he told reporters.

According to the Karnataka Health Department, the state has so far recorded 659 COVID-19 cases, including 324 discharged and 28 deaths.

Pathnamthitta, Mar 10: A man under observation for suspected coronavirus infection at the isolation ward of the district hospital here fled, but was tracked and brought back within hours. The man was among those who had interacted with the three-member family who returned from Italy and have tested positive for the virus.

Pathnamthitta district collector PB Nooh said one person, who was under observation at the general hospital had escaped but was later tracked and brought back. "If even a single person under observation goes out, it is a threat. This is a public hazard".

The one excercise which the health authorities have to undertake on Tuesday is to see how many people had come incontact with this person after he left the hospital. There is need to isolate those people with whom he mayhave come into contact, the collector said "This is the timeto behave in a very socially responsible manner".

With six positive cases being reported, the state government has already warned that stringent action would be taken against those flouting the directions of the health department. Health Minister K K Shailaja has warned that those coming from COVID19 affected nations, should report to authorities on arrival in the state, failing which a case would be registered against them under the Public Health Act.

A 3-member family, which had come from Italy recently and had tested positive along with two of their relatives had not reported their arrival to the authorities, health officials said.

At least 733 people who had come in contact with them have been tracked, the collector said and have been placed under observation. While 18 have been admitted to isolation wards in hospital the remaining are under home surveillance.

A two-year-old child is among those under obsevation at the isolation ward, health department sources said. The tracking excercise would continue on Wednesday also.

Meanwhile, an awareness class was held for migrant workers at Pathnamthitta district this morning. However, no directions have been issued to workers fromother states to leave the state. "We are planning to give extra care to migrant workerswith labour officer visiting their colonies and as part of theawareness drive and speaking to them in a language theyunderstand," he said.

A three-year-old boy, who arrived with his parents in Kochi from Italy, tested positive on Monday, a day after three people, also with travel history from the European nation,were declared positive for the virus along with two of their relatives.

The Health Minister has said surveillance system would be stregthened with the support of ASHA workers, civic authorities and ward members and resident associations. Presently, 1,116 people are under surveillance in thestate for the corona virus, 967 in home quarantine and 149 in isolation wards of hospitals. Two 90-year-old relatives of the Pathnamthitta family, who tested positive, have been admitted to Kottayam medicalcollege hospital and their samples have been sent for testing, she said. "If they test positive for the virus, it would be highlyrisky", she had said.

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