![](https://static01.nyt.com/images/2020/07/24/science/24VIRUS-CDC-SCHOOLS1/24VIRUS-CDC-SCHOOLS1-mediumThreeByTwo440.jpg)
By BY ABBY GOODNOUGH from NYT Health https://ift.tt/2OSTL0R
Researchers found that more than 20% of households nationwide lacked enough bedrooms and bathrooms to allow a person with COVID-19 to isolate. That covers roughly one-quarter of the population.
There were no cases of coronavirus transmission to the babies during birth or after two weeks of breastfeeding and skin-to-skin contact.
A video recording showed that the 3-ply surgical mask was the most effective, but even a single-layer mask reduced the spread of droplets.