Back in April, I covered evidence from the Diamond Princess Cruise Ship suggesting that COVID-19 has very little if any transmission in the open air. Despite open balconies with free flowing air during the quarantine period of the outbreak, and despite central air conditioning that derived 30% of its air from the outdoors, transmissions only …

In a preprint published today, researchers collected air samples from six COVID-19 patients. They grouped aerosols between 0.542 and 20 micrometers into three groups of <1, 1-4, and >4 micrometers, resulting in 18 samples. Three of the 18 samples were able to produce viral growth in isolated cells: a 1-4 micrometer sample from one patient, …

A number of you have asked me to write about masks. I’m not quite ready to do a deep dive on masks yet, but for tonight I’ll share the results of a preprint* published today that provides some insights into how dangerous the indoor air is, and, indirectly, how useful masks might be in protecting …

Today, researchers and physicians from the Mount Sinai Health System and its associated Icahn School of Medicine released a preprint* titled “SARS-CoV-2 infection induces robust, neutralizing antibody responses that are stable for at least three months.” The title of the paper suggests that there is antibody-mediated immunity to COVID-19 lasting at least three months after …

Yesterday, I covered a Nature paper that found 100% of 36 subjects who had recovered from COVID-19 had virus-specific T cells capable of providing immunity. Another paper was published yesterday in Science, however, showing that COVID-19 cases can be classified into three immunotypes, one of which has virtually no T cell or antibody response at all. The Nature …