There have been some COVID cases at the Hopkinton Public Schools, but overall, the first few weeks have gone well, according to Superintendent Carol Cavanaugh.

In an email to school families on Friday, Cavanaugh wrote that the schools “have enjoyed a strong return to full-time, in-person learning for all students. It’s wonderful to have our students back in our school buildings!”

She indicated that there had been two students who had tested positive, but no transmission of the virus in school.

“Let’s hope that masking and other layered mitigation measures keep working,” she wrote.

Earlier last week, Cavanaugh shared information about a COVID-19 “test and stay” program for students who may have been exposed while in school but are not showing symptoms. A non-invasive swab sample is collected under the supervision of a school nurse or trained health provider. Affected students can remain in school as long as they test negative via the daily rapid test — up to seven days from the close contact — and stay symptom-free. Parents must first fill out an online form to consent to the testing.

Cavanaugh encouraged parents to “closely monitor your children for any COVID-19 symptoms” to help stop the spread and avoid having to quarantine close contacts.

“Let’s be grateful for all we have accomplished,” she added. “Give your children a pat on the back; we appreciate how eager they are to learn, to re-assimilate to school, to wear masks for hours on end, and to engage in mutual respect with Hopkinton’s exceptional teachers.”