BOSTON — Massachusetts on Tuesday designated the site of its next COVID-19 mass vaccination site: Fenway Park. Starting Feb. 1, the ballpark will begin administering 500 vaccines per day by appointment and will soon ramp up to providing 1,000 vaccines per day to eligible residents in Phase One priority groups under the state’s vaccination plan, state officials said. CIC Health will operate the site, with Beth Israel Deaconess Medical Center as the medical director. The site is expected to stay open through the beginning of baseball season in early April.