Merge pull request 18F#517 from 18F/cdc-content-4-16

Adds 3 new CDC FAQs for Symptoms & Testing

_content/symptoms-and-testing/if-i-recover-from-covid19-will-i-be-immune.md

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+---
+title: If I have recovered from COVID-19, will I be immune to it?
+category: symptoms-and-testing
+layout: post
+date: April 14, 2020
+source: CDC
+promoted: false
+source_url: https://www.cdc.gov/coronavirus/2019-ncov/faq.html#Symptoms-&-Testing
+excerpt: Symptoms and testing
+---
+
+CDC and partners are investigating to determine if you can get sick with COVID-19 more than once. At this time, we are not sure if you can become re-infected. Until we know more, continue to take steps to protect yourself and others.

_content/symptoms-and-testing/kind-of-test-used-to-diagnose-covid19.md

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+---
+title: What kind of test is being used to diagnose if I have COVID-19?
+category: symptoms-and-testing
+layout: post
+date: April 14, 2020
+source: CDC
+promoted: false
+source_url: https://www.cdc.gov/coronavirus/2019-ncov/faq.html#Symptoms-&-Testing
+excerpt: Symptoms and testing
+---
+
+Many tests to diagnose COVID-19 have received an [Emergency Use Authorization (EUA)](https://www.fda.gov/medical-devices/emergency-situations-medical-devices/emergency-use-authorizations) from the Food & Drug Administration (FDA). All of these diagnostic tests identify the virus in samples from the respiratory system, such as from nasopharyngeal swabs.
+
+Locations and types of testing sites may vary by state or territory (see question: Where can I get tested). Check with your testing site to learn which test it uses. You can find a [patient information sheet for each test](https://www.fda.gov/medical-devices/emergency-situations-medical-devices/emergency-use-authorizations#covid19ivd) on the FDA site.
+
+Be aware that at this time, no home tests have been authorized for use. All tests must be done at a testing site. The FDA sees the public health value in expanding testing that may include home collection, and they are actively working with test developers on this goal.

_content/symptoms-and-testing/what-is-serology-testing.md

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+---
+title: What is serology testing? And can I be tested using this method?
+category: symptoms-and-testing
+layout: post
+date: April 14, 2020
+source: CDC
+promoted: false
+source_url: https://www.cdc.gov/coronavirus/2019-ncov/faq.html#Symptoms-&-Testing
+excerpt: Symptoms and testing
+---
+
+Serology testing checks a sample of a person’s blood to look for antibodies to SARS-CoV-2, the virus that causes COVID-19. These antibodies are produced when someone has been infected, so a positive result from this test indicates that person was previously infected with the virus.
+
+CDC is working with other federal agencies to evaluate the performance of commercially manufactured serology tests that may become available from healthcare providers. This evaluation is expected to be completed in late April.
+
+We do not know yet if the antibodies that result from infection with SARS-CoV-2 can protect someone from reinfection with this virus or how long antibodies to the virus will protect someone. Scientists are conducting research to answer those questions.
+
+Serology tests may not be able to tell you if you are currently infected because it typically takes 1 to 2 weeks to develop antibodies to SARS-CoV-2. To tell if you are currently infected, you would need a test that identifies the virus in samples from your upper respiratory system, such as a nasopharyngeal swab.