Melissa Joan Hart is on the road to recovery after testing positive for COVID-19.

Last Wednesday, the 45-year-old actress shared that she had likely gotten COVID-19 from her eldest son, Mason Walter, 15, whom she thinks contracted the virus at school, according to PEOPLE.

On Sunday, Hart said she was “doing so much better.”

Hart said in an Instagram video, “I’m just sending an update because so many people have been checking on me. I want to let you know that I’m doing so much better. I feel like I’m probably at like 75%; at the last video I was probably like 20-25%.”

“It’s been a rough week, but I’m feeling better; Mason’s feeling better,” she added.

Hart also said that her youngest son Tucker McFadden, 8, has since tested positive. She said, “Tucker, my little one, is positive but no symptoms, so that’s good. So far Brady is negative, my middle one. And waiting on [her husband] Mark’s results which got lost in the mail, so.”

The director said she is continuing to rest, away from her family.

“I’m staying very isolated and separate, and just wanted to send love to everybody out there,” Hart said. “Thanks for checking on us, thanks for all the chicken soup. I really felt the outpouring of love, and I just want to thank you. Stay safe everybody.”

Last week, the Sabrina The Teenage Witch star said she had tested positive for COVID-19 despite being fully vaccinated, expressing her frustration with the lack of a mask mandate at schools in her home state of Tennessee.

She said, “I think as a country we got a little lazy and I’m really mad that my kids didn’t have to wear a mask at school. I’m pretty sure where this came from.”

Breakthrough cases are rare, but possible and expected, as experts say the vaccines are not 100% effective in preventing infections. However, vaccinated people who test positive are less likely to experience a severe illness than unvaccinated. The CDC said that 99% of deaths from COVID-19 were in unvaccinated people.

Last week, Hart said she was “scared and sad, and disappointed in myself and some of our leaders. I just wish I’d done better, so I’m asking you guys to do better. Protect your families. Protect your kids.” Hart said of the pandemic, “It’s not over yet. I hoped it was, but it’s not, so stay vigilant and stay safe.”