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HEROS: Various results on infections
An NIH study has a set of results.

  • Obesity and high BMI increase risk of getting SARS-CoV-2  (as well as increased risk of a severe case for obese individuals).
  • Asthma, eczema, and allergic rhinitis did not affect the risk of getting SARS-CoV-2.
  • Having self-reported, physician-diagnosed food allergies is associated with a 50% decreased risk of getting SARS-CoV-2

Quote:children ages 12 years or younger are just as likely to become infected with the virus as teenagers and adults, but 75% of infections in children are asymptomatic. In addition, the study confirmed that SARS-CoV-2 transmission within households with children is high.
This surveillance took place in 12 U.S. cities between May 2020 and February 2021, before the widespread rollout of COVID-19 vaccines among non-healthcare workers in the United States and before the widespread emergence of variants of concern.
The HEROS researchers found that children, teenagers and adults in the study all had around a 14% chance of SARS-CoV-2 infection during the six-month surveillance period.  Infections were asymptomatic in 75% of children, 59% of teenagers and 38% of adults. In 58% of participating households where one person became infected, SARS-CoV-2 was transmitted to multiple household members.
The viral load range among infected children was comparable to that of teenagers and adults.
The HEROS investigators concluded that young children may be very efficient SARS-CoV-2 transmitters within the household due to their high rate of asymptomatic infection, their potentially high viral loads, and their close physical interactions with family members.

I wonder if they tracked who brought the first infection into households, and correlated that with outside conditions:  Work at home or not; in school/daycare or not; in other outside activities (sports, etc) or not.

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