Camp, 37, knows this because she contracted the highly infectious disease, and she believes it was after one time not wearing her mask in public. The actress explained her experience in an Instagram post Tuesday in which she urged readers not to let their guard down.
"I’m lucky. Because I didn’t die. But people are," Camp wrote. "Please wear (your) mask. It can happen any time. And it can happen to anyone."
Camp, who split from husband and fellow "Pitch Perfect" star Skylar Astin in 2019, said she had been fastidious about her mask-wearing and followed other COVID-19 precautions, such as regularly applying hand sanitizer.
"One time, when the world was starting to open up, I decided to forgo wearing my mask in public. One. Time. And I ended up getting it," says Camp.
She was "extremely sick" for three weeks, but has tested negative for COVID-19.
"People are saying it’s like having the flu, but I’ve had the flu, and this is absolutely not that," wrote Camp. "The panic of contracting a virus that is basically untreatable and is so new that no one knows the long term irreparable damage it does to your immune system, is unbelievably stressful."
The actress lost her sense of taste and smell during the battle, with the smell only returning partially a month later.
Other lingering symptoms, a month later, include "dizziness, extreme fatigue, impacted sinuses, upset stomach, nausea, vomiting, and fever," she wrote.
Camp ended her post urging people again to follow CDC guidelines to protect against the virus.
"Let’s all do our part and wear a mask," she wrote. "I don’t want any of you to go through what I did. Even though it’s a little thing, it can have a huge impact."
Fellow "Pitch Perfect" stars including Brittany Snow and Shelley Regner weighed in on the post.
"Thank you for sharing your story to spread more awareness and advocacy for safety and health during this crazy and uncertain time," wrote Regner. "Sending you all the virtual healing and positive vibes."
"Jurassic World" actress Bryce Dallas Howard called the post "a powerful reminder."
"Thank you for being so open," wrote Howard. "And so grateful you are in the process of recovering!"
This article originally appeared on USA TODAY: Anna Camp contracted COVID-19 after not wearing mask 'one time'