![Taiwan McCall, left, useless a nasal swab to test James Reese for COVID-19 in the Harlem section of New York, Monday, April 20, 2020. While many laboratories and companies are now offering tests, there are still only two main types available. The nasal swab test tells you if you have an active viral infection right now. A separate blood test tells you if you were previously exposed to the virus and fought off the infection. Virus Outbreak Two Tests](https://i.cbc.ca/1.5540423.1587507992!/cpImage/httpImage/image.jpg_gen/derivatives/16x9_460/virus-outbreak-two-tests.jpg)
Widespread testing for the coronavirus is considered a key part of the pandemic response, both for diagnosing infections and, potentially, to ease lockdowns. Here's a primer on different types of testing, and their pros and cons.
from CBC | Health News https://ift.tt/2XUfLOx
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