domingo, 17 de mayo de 2020

Coronavirus [NEW TOPIC PAGE]

Hot Topics of the Day|PHGKB

Coronavirus

Coronavirus COVID-19 Existing limited data on antibody responses to SARS-CoV-2 and related coronaviruses, as well as one small animal model study, suggest that recovery from COVID-19 might confer immunity against reinfection, at least temporarily. However, the immune response to COVID-19 is not yet fully understood and definitive data on postinfection immunity are lacking.
There is an urgent need for direct evidence to inform development of behavioral interventions, but it is possible to make a start by applying behavioral science methods and models
Reading the pandemic data
JM Zacks et al. Science blog, May 12, 2020
Understanding the spread of COVID-19 requires understanding nonlinear growth. Whereas linear growth is intuitive, nonlinear growth is not. People’s predictions for nonlinear patterns tend to be closer to linear projections, assuming that future growth will be similar to that of the past. For a pandemic, this can lead to dangerous underestimation.
Interpreting a covid-19 test result
J Watson et al, BMJ, May 12, 2020
The result of a test for covid-19 depends on the accuracy of the test, and the pre-test probability or estimated risk of disease before testing. A positive RT-PCR test has more weight than a negative test because of the test’s high specificity but moderate sensitivity. A single negative test should not be used as a rule-out in patients with suggestive symptoms.

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