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Lack of ventilation ups risk of airborne transmission of Covid-19: Study

Improved indoor ventilation is an important step that can be taken to reduce the risk of infection.

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London, May 29 : Researchers, including one of Indian-origin, have found that the lack of adequate ventilation in many indoor environments – from the workplace to the home – increases the risk of airborne transmission of Covid-19.

In a study, published in the City and Environment Interaction journal, experts from the University of Surrey (UK) said that preventing airborne transmission of Covid-19 should be the next front of the battle against the virus.

The World Health Organisation (WHO) had declared the infectious spread of SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) a pandemic after its initial outbreak in Wuhan (China). “These past months, living through the Covid-19 crisis, has been truly unprecedented, but we must turn this global tragedy into an opportunity to better prepare for similar threats,” said study author Prashant Kumar, Professor at the University of Surrey.

Improved indoor ventilation is an important step that can be taken to reduce the risk of infection.

“However, more must be done to recognise and understand the airborne transmission of Covid-19 and similar viruses, to minimise the build-up of virus-laden air in places typically containing high densities of people,” Kumar added.

According to the researchers, Covid-19, like many viruses, is less than 100 mn in size but expiratory droplets (from people who have coughed or sneezed) contain water, salts and other organic material, along with the virus itself.

Experts have noted that as the water content from the droplets evaporates, the microscopic matter becomes small and light enough to stay suspended in the air and over time the concentration of the virus will build-up, increasing the risk of infection – particularly if the air is stagnant like in many indoor environments.

The study highlights improving building ventilation as a possible route to tackling indoor transmission of Covid-19. “We discuss the need to acknowledge the airborne spread of COVID-19 inside built spaces under eased movement restrictions and the potential steps that can be taken to control it,” the study authors wrote.

As of Friday morning, the overall number of global coronavirus cases has topped 5.8 million, while the deaths have increased to more than 360,000, according to the Johns Hopkins University.

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India just 400 short of Russia, as record 25K new cases take tally past 6.73L

The United States remained the worst-hit country with 28,39,436 cases, followed by Brazil with 15,77,044.

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Coronavirus India

New Delhi: India recorded a single-day spike of record 24,850 new coronavirus cases on Sunday, taking its total tally to 6,73,165 even as over 600 deaths in the last 24 hours increased the country’s death toll to 19,268, Ministry of Health and Family Welfare data revealed.

As many as 4,09,083 patients have been cured and discharged from hospitals. India now has 2,44,814 active cases in the country.

On the global front, India is 399 cases away from beating Russia to become the world’s third worst-hit nation with the coronavirus pandemic. While India has 6,73,165 cases, Russia has 6,73,564 cases.

The United States remained the worst-hit country with 28,39,436 cases, followed by Brazil with 15,77,044.

With a spike of more than 7,000 cases in just one day, Maharashtra remained the worst- hit state with its total cases crossing the 2-lakh mark (2,00,064) and 8,671 casualties, of which 295 occurred in the last 24 hours.

Southern state of Tamil Nadu followed with 1,07,001 corona cases including 1,450 deaths. Tamil Nadu witnessed a spike of 4,280 cases and 65 deaths in just one day.

At the third spot, national capital Delhi witnessed a spike of 2,505 cases in the last 24 hours, taking the total corona tally to 97,200. Delhi now has 25,940 active cases, with 3,004 deaths. As many as 68,256 patients have recovered and since discharged from hospitals.

States with more than 10,000 cases include Gujarat (35,312) with 1,925 deaths, Uttar Pradesh (26,554), Rajasthan (19,532), Madhya Pradesh (14,064), West Bengal (21,231), Haryana (16,548), Karnataka (21,549), Andhra Pradesh (17,699), Telangana (22,312) and Bihar (11,700) cases.

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Israel reports 977 new coronavirus cases; 29,032 in total

As a result, Minister of Public Security Amir Ohana has entered home quarantine until July 12, after meeting twice with Shabtai in the past two weeks.

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Jerusalem, July 5 : Israel’s Ministry of Health has reported 977 new coronavirus cases, bringing the total number of infections in the country to 29,032.

The number of Covid-19 deaths increased from 326 to 330, while the number of patients in serious conditions increased from 77 to 84 out of 296 patients currently hospitalised, Xinhua reported.

The number of recoveries increased to 17,773, with 104 new recoveries, while the number of active cases hit 10,929.

Earlier on Saturday, Israeli police said that Israeli border police chief Yaakov Shabtai tested positive for the novel coronavirus, adding that his health condition is good.

As a result, Minister of Public Security Amir Ohana has entered home quarantine until July 12, after meeting twice with Shabtai in the past two weeks.

Meanwhile, the Health Ministry said that Israeli President Reuven Rivlin, Defence Minister Benny Gantz and army chief of staff Aviv Kochavi will not have to undergo quarantine despite meeting with Shabtai on Thursday.

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Global COVID-19 Cases Top 11.1 Million, US Tally Surpasses 2.8 Million

The US accounted for the world’s highest number of infections and fatalities with 2,838,678 and 129,672, respectively.

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The overall number of global COVID-19 cases has increased to more than 11.1 million, while the deaths have soared to over 528,000, according to the Johns Hopkins University.

On Sunday morning, the total number of cases stood at 11,199,747, while the fatalities rose to 528,953, the University’s Center for Systems Science and Engineering (CSSE) revealed in its latest update.

The US accounted for the world’s highest number of infections and fatalities with 2,838,678 and 129,672, respectively, according to the CSSE.

Brazil came in the second place with 1,539,081 infections and 63,174 deaths.

In terms of cases, Russia ranks third (673,564), and is followed by India (648,315), Peru (299,080), Chile (291,847), the UK (286,412), Mexico (252,165), Spain (250,545), Italy (241,419), Iran (237,878), Pakistan (225,283), Saudi Arabia (205,929), Turkey (204,610), France (204,222), Germany (197,198), South Africa (187,977), Bangladesh (159,679), Colombia (109,793) and Canada (107,185), the CSSE figures showed.

The other countries with over 10,000 deaths are the UK (44,283), Italy (34,854), Mexico (30,366), France (29,896), Spain (28,385), India (18,655), Iran (11,408), Peru (10,412) and Russia (10,011).

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