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Vail points out that the state of Michigan and the Centers for Disease Control do not use the phrase “naturally immunized” to describe people who have had COVID-19. “While being sick with COVID does provide some immunity," Vail says, "there is really not any good information related to how long that lasts.”
Natural infection will create some immunity, but Vail adds "how robust that is, is an unknown. There are studies out there showing that the vaccine does give a more robust response.”
Vail also says there is a concern about whether that immunity would continue to protect against variants of the coronavirus. Being infected twice is rare, she says, but can happen, and can lead to life-threatening complications.