After receiving the notice from the school, the school will organize all classes to vaccinate the second dose of COVID-19 vaccine in batches. The first dose was vaccinated on November 8, 2021, and 30 days later, the second dose was arranged on December 1, 2021, both of which are vaccines from Beijing Science and Technology. Because their class vaccination time is arranged at 3:00 p.m., so in the morning, they also need to