HANFORD â The weekend marked another successful mass vaccination clinic at Sierra Pacific High School with 2,700 COVID-19 vaccines administered. The public vaccination event was the eighth of its kind for Adventist Health and the second hosted by Sierra Pacific, after the first clinic vaccinated about 1,000 residents on Jan. 30. On Saturday, 1,200 second doses were administered to the aforementioned first group. 1,500 residents received their first dose of the vaccine on Sunday. âFor today, the new people, theyâre happy,â Dr. Raul Ayala, ambulatory medical officer for Adventist Health, said. âTheyâve just been waiting to get their vaccine and theyâre happy today.â