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Coronavirus Newsletter – Times of India

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BILL
  • The Indian Health Ministry confirmed 1,750,723 Covid-19 cases (567,730 active cases) and 37,364 deaths. On Saturday, 54,735 new cases were registered.
  • Deaths worldwide are 685,102 (more than 17.85 million infections).

Numbers are as of Sunday, 12:30 pm IST. Check the latest data here

TAKE TODAY
The risk of transmission on a train.
The risk of transmission on a train.
Courtesy: University of Southampton.

  • A study by scientists at the University of Southampton has examined the possibilities of catching Covid-19 in a train car carrying an infected person. Based on high-speed routes in ChinaThe researchers found that for train passengers seated within three rows (width) and five columns (length) of an infected person (index patient) between 0-10.3% contracted the disease. The average transmission rate for these ‘close contact’ travelers was 0.32%.
  • The study, in collaboration with the Chinese Academy of Sciences, the Chinese Academy of Electronics and Information Technology, and the Chinese Center for Disease Control and Prevention, also showed that passengers traveling in seats directly adjacent to an index patient suffered the highest level of transmission, with an average of 3.5% contracting the disease. For those sitting in the same row, the figure was 1.5%.
  • The “ attack rate ” for each seat, the number of passengers in a given seat diagnosed with Covid, divided by the total number of passengers traveling in the same seat, increased by 0.15% for every hour that a person traveled with an index patient. For those in adjacent seats, this rate of increase was 1.3% per hour higher – the highest among all seats considered. Interestingly, the researchers found that only 0.075% of people using a seat previously occupied by an index patient contracted the disease.
  • The researchers conclude that, given the estimated attack rates for passengers in the same row as an index patient, a safe social distance of more than 1m is required for an hour of travel together. After two hours of contact, they consider that a distance of less than 2.5 m may be insufficient to prevent transmission.

More details here.

TELL ME SOMETHING
BCG injections may slow the spread of Covid-19, study finds
BCG injections may slow the spread of Covid-19, study finds
  • A US research article says the TB vaccine ‘slows down’ the spread of Covid-19 within the community. The article published in Scientific advances, a peer-reviewed medical journal presented by the American Association for the Advancement of Science, said countries with mandatory vaccination against Bacillus Calmette-Guerin (BCG) showed “slower infection and death rates” during the first 30 days of the Covid-19 outbreak in your country.
  • Countries like India and China, which have included BCG in the national immunization program, have had relatively lower death rates. Some sections of physicians believe that it is the BCG vaccine that protects people against Covid-related complications. The BCG vaccine given to babies within 15 days after birth to prevent tuberculosis is also known to strengthen immunity against other infectious diseases.
  • The US study looked at the daily rate of increase of confirmed Covid cases in 135 countries and deaths in 134 countries in the first 30-day period of each country’s outbreak. “Mandatory BCG vaccination was correlated with a flattening of the curve in the spread of Covid-19,” the analysis showed.
  • However, not all health experts are convinced. “It seems like a conjecture right now, especially since India and Brazil, which have BCG vaccination programs, have a lot of cases,” says one. More details here.
THE GOOD NEWS
Indian megacities see decline in Covid-19 breeding rate
Indian megacities see decline in Covid-19 breeding rate
  • With the number of active cases in Delhi down From a high of 28,000 on June 27 to less than 11,000 as on Sunday, the number of active cases in the national capital is expected to drop to less than 1,000 next month, if the current infection rate is maintained. Delhi’s R-zero rate, which measures the rate of reproduction of the infection – that is, how many healthy people the disease transmits an infected person – has been consistently less than 1 for most of July. Currently, Delhi’s R-zero rate is 0.66, which means that 100 infected people will infect another 66. That is a huge improvement from the time that Delhi The R-nothing rate was almost 2 – which means that each infected person was transmitting the disease to 2 people.
  • The drop in the R-zero rate has also been manifested in the improvement in the recovery rate of Delhi, which, with more than 89%, is now the highest in the country. However, Delhi is not alone: ​​the capital’s cousins, Mumbai and Chennai, have also joined the R-cero rate club. Mumbai’s R-zero rate in the last week of July was 0.81, while Chennai’s was 0.86. Admittedly, it’s still too early for these three cities to pop champagne, but with their recovery rates well above 80%, a bit of cautious optimism wouldn’t hurt. Overall, India’s R-zero rate for July was 1.16.
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Written by: Rakesh Rai, Judhajit Basu, Sumil Sudhakaran, Tejeesh NS Behl
Investigation: Rajesh Sharma

Times of India

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