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Will an antibody test show whether I’m immune and can go back to work?

Not necessarily. Antibodies are a body’s response to bacteria or viruses. But this novel coronavirus is so new, it’s still not clear whether having antibodies to it means you have long-term protection from getting reinfected.

“The thing we don’t know yet is what is the relationship between the level of antibody and the degree of your protection,” Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, told Snapchat’s “Good Luck America” show.

“So you may be positive for an antibody, but not enough to protect you.”

There’s also a risk that some antibody tests might confuse the novel coronavirus with other coronaviruses, like the ones that cause the common cold.