Melissa Joan Hart is doing 'better' after revealing COVID case in emotional plea to 'stay safe'

Melissa Joan Hart is sharing a health update after she revealed she was struggling with a breakthrough COVID-19 case last week which she believes came from her kids' school.

"I'm doing so much better," the "Sabrina The Teenage Witch" star shared in a Instagram video Sunday. "I feel like I'm probably at like 75%. My last video was probably like 20-25%."

The actress added that her son, Mason, 15, who also tested positive, was feeling better as well and that her youngest son, Tucker, 8, was positive but not experiencing any symptoms. Her other son, Braydon, 13, tested negative and they are still waiting on the results of her husband Mark Wilkerson's test, she said.

She thanked everyone for checking in on her family after she shared the news Thursday alongside an "important" message about the pandemic.

"I got COVID. I am vaccinated and I got COVID and it's bad," she shared in an Instagram video from her bed. "It's weighing on my chest. It's hard to breathe."

She noted she doesn't normally do videos and she wasn't posting "to be political or gain pity," but felt an urge to voice her family's health struggles in hopes it may help others.

"I'm mad. I'm really mad," she said. "We took precautions, but we got a little lazy. I think as a country we got lazy and I'm really mad my kids didn't have to wear masks at school. I'm pretty sure that's where that come from."

Hart added that she was thankful her youngest has been wearing his mask because he had gotten used to it from last year. She called him a "superhero" for helping to protect his teacher and classmates.

Coronavirus cases continue to surge across the country, mostly due to the highly-contagious delta variant.

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New daily caseloads have surpassed 150,000 nationwide, but thanks to vaccines, cases are still about half the total from the pandemic's most horrific point in January, and the current weekly average of about 800 deaths a day remains one-quarter of the fatalities at that time.

But as kids head back to school this fall, and with no vaccine available for kids under 12 years old, cases and hospitalizations among children are on the rise. The delta variant makes up about 90% of new infections among kids, according to experts.

Safety measures in schools such as mask-wearing, social distancing and virtual learning vary widely across the country.

Through tears, Hart hoped that the rest of her family stays healthy "because if someone has to be taken to the hospital, I can't go with them."

She begged the community to "stay vigilant and "stay safe."

"I'm just scared, sad and disappointed with myself and some of our leaders and a lot of people including myself," she said. "I just wish I'd done better so I'm asking you guys to do better. Protect your families. Protect your kids. It's not over yet. I hoped it was, but it's not."

Contributing: Jorge L. Ortiz, Christine Fernando, Nicole Carroll

This article originally appeared on USA TODAY: Melissa Joan Hart COVID update: 'I'm doing do much better'