Serious question, why is it bad for a healthy younger person to get the virus? They have no actual evidence or reinfection. Most vaccines seem to be working with antibodies from people with prior infection.
Severity of disease isn't well understood yet. There's a tentative link to number of ACE-2 receptors that an individual has, but no real means by which to test that ahead of time.
In the ED here, the SARS-COV2 virus, which causes the disease COVID-19, has taken young, old, and everywhere in-between. 2 infants died, 24 hours apart, from bilateral double pneumonia with ground glass opacities. No tests done, because none available due to shortages. This disease can steal any of us.
What does testing nonsymptomatic people do? It's just a test at that moment that won't have a result for days. The test can show ok, but you get infected on the way home from testing? What does the test do?
Identifying pre-symptomatic and asymptomatic carriers is essential in breaking the transmission chain. Contact tracing outward from that positive saves lives.
Don't get infected on the way home, wear a mask and please socially-distance.
Please note that there's a difference between the antibody tests, looking for either the IgG or IgM. IgM is produced first, and lasts about 2 weeks or so after recognizing the virus' attack. IgG is developed after about 1.5-2 weeks, and persists for months or possibly years. We're not sure about how long the IgG sticks around in this case.
The PCR test looks for active infection, and takes a bit of time to amplify certain portions to test threshold. This will tell a doc if you're sick with SARS-COV2 or some other flu-neg disease. This can take as little as an hour, but is usually more like 4-6 with throughput.
Please let me know if you have any more Qs.