School

Spring School Closures Over Coronavirus Saved Lives, Study Asserts

But other experts noted that the impact of preventive measures taken by states — including stay-at-home orders, closures of restaurants and nonessential businesses and limits on large social gatherings — simultaneously or shortly after school closings, made it hard to determine the specific role of schools in such analyses.

“I think we have to be incredibly cautious when interpreting estimates from a study like this,” said Julie Donohue, a professor of public health at the University of Pittsburgh who co-wrote an editorial about the study. “In particular, I think it’s important to emphasize that we really can’t isolate the impact of school closures from other interventions.”

Dr. Donohue added that “even if these numbers were accurate or valid, we don’t know how much of the effect would be derived from reducing contacts among kids at school, versus reducing contacts among parents who have to stay home from work because

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Will a Coronavirus Antibody Test Allow Us to Go Back to School or Work?

The first type of antibody to appear is called immunoglobulin M or IgM, and its levels spike within a few days of infection. But IgM is a generic fighter. To target and destroy a specific virus, the body refines it into a second type of antibody, called immunoglobulin G, or IgG, that can recognize that virus.

As IgG levels rise, IgM levels drop; IgG levels peak around 28 days after the onset of infection.

There is a third type of antibody, called IgA, that is present in mucosal tissues — like the inner lining of the lung. IgA is known to be important for fighting respiratory infections such as influenza, and is likely to be central in coronavirus infection, too.

Many of the tests being developed look for levels of all three antibodies; some look for just IgM and IgG, and still others test for only one type.

What can

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