According to the “School Health Guidelines for Prevention of Coronavirus Disease 2019” issued by the Education Bureau on January 31, 2023, parents are reminded to pay attention to the following:

1. Vaccination

• Vaccination is the most effective safeguard measure against COVID-19 and can reduce the risk of severe cases and fatalities. Schools should strengthen the promotion of vaccination to students (especially boarders of special schools), parents, as well as their family members, and encourage them to get vaccinated actively. Schools can add the link of the website of the COVID-19 Vaccination Programme to the school website to facilitate students and parents to obtain the latest vaccination
  information.

The relevant link is as follows: https://www.covidvaccine.gov.hk/en/

• 1.1 Aalculation of number of vaccine dosage

•  Arrangements for whole-day face-to-face classes:
• For secondary schools: secondary schools with the number of students who have received two doses of vaccine for more than 14 days for the whole school or an individual class level reaching 90% or more of the number of students of the whole school or an individual class level eligible to receive vaccination may apply to the Education Bureau (EDB) to arrange whole-day face-to-face classes and after school activities for the whole school or an individual class level. The arrangement will continue until 31 January 2023. Starting from 1 February 2023, all secondary schools (including secondary sections of special schools) will fully resume whole-day face-to-face classes
  regardless of the vaccination rates.

• For primary schools: starting from 1 December 2022, primary schools with students who have received two doses of vaccine for more than 14 days for the whole school or an individual class level reaching 70% or more of the total number of students of the whole school or an individual class level eligible to receive vaccination may apply to the EDB to arrange whole-day face-to-face classes for the whole school or an individual class level and after school activities. The arrangement
  will continue until 14 February 2023. Starting from 15 February 2023, primary schools (including primary sections of special schools) will fully resume whole-day face-to-face classes regardless of the vaccination rates.

For the reference: https://www.edb.gov.hk/en/sch-admin/admin/about-sch/diseases-prevention/guidelines-covid19.html