AC air flow spread Covid-19 in China restaurant
On January 24, nine people from three families contracted Covid-19 while having lunch at a restaurant in Guangzhou, China. Another 81 who were in the eatery did not.
The infections, according to an analysis by Center for Disease Control (CDC) experts in China, took place because the three families were in the draught of the same air conditioner as the index patient, although they were on different tables.
The findings now offer new insights -- how the virus travels (it infected only those in the air current while others were safe); the challenge in detecting infected persons (the index patient did not have any symptoms); and consequences for closed, air-conditioned spaces (restaurants, offices, even public transport) -- as the world struggles to determine how people can go back to everyday routines.
“On January 23, family A travelled from Wuhan and arrived in Guangzhou. On January 24, the index case-patient (patient A1) ate lunch with 3 other family members (A2–A4) at restaurant X. Two other families, B and C, sat at neighbouring tables. Later that day, patient A1 experienced fever and cough and went to the hospital. By February 5, a total of nine others (four members of family A, three members of family B, and two members of family C) had become ill with Covid-19,” said the research letter published in the journal Emerging Infectious Diseases.
The researchers say the infections show the virus was spread through droplets carried in the air-conditioning draught.
The lack of infection in others at two tables close by (but not in the line of the air flow), and in other floors of the restaurant appeared to suggest the virus did not spread through “aerosol transmission”.
If a virus spreads as an aerosol, it is harder to contain since it lingers in the air for longer and disperses more easily over longer distances.
The U.S. Centers for Disease Control and Prevention on Friday published recommendations by its group of independent experts on a smallpox vaccine that limit its use to only people who work closely with viruses such as monkeypox. The publication of the vote by the CDC's Advisory Committee on Immunization Practices, which took place in November last year, formalizes the recommendations.
The U.S. Securities and Exchange Commission is looking into Tesla Chief Executive Officer Elon Musk's disclosure of his stake in Twitter Inc in early April, according to a letter the agency sent to him that month. Musk was offered a board seat shortly after his initial disclosure and has since gone on to attempt to buy the company outright in a $44 billion deal to take it private. An SEC spokesperson declined to comment.
Nearly 20 officers stood in a hallway outside of the classrooms during this week's attack on a Texas elementary school for more than 45 minutes before agents used a master key to open a door and confront a gunman, authorities said Friday.
Former Pakistani prime minister Imran Khan on Friday stormed out of a press conference in Peshawar after he was questioned by a journalist on his party Pakistan Tehreek-i-Insaaf's role in the social media, Pakistan website Geo TV reported. This comes a day after the former prime minister and several senior leaders were booked for arson and vandalism in Islamabad during Azadi March.
More than 20 countries across the globe have reported detections of Monkeypox cases so far taking the total tally to nearly 200, the World Health Organisation. It had reported its first infection on May 18. Canada: Canada has a total of 25 infections of Monkeypox. Spain: The European nation has so far logged 84 cases of disease. The number saw a significant rise on May 26 when the country logged 25 cases.