State authorities began Tuesday the massive vaccination of 15-17 teenagers in Baja California.

The day before the state vaccinated students with the Cecyte High School System. However, the beginning was not a smooth one as system officials initially decided to administer vaccines to students of three campuses. Eventually, the system decided to open the vaccination clinic to all Cecyte students.

Hours later, Mexican government delegate Alejandro Ruiz said the clinic was opened to all those aged 15-17.

The Mexican official told reporters in a press conference the high school was only the site to administer vaccines to all teenagers.

Late Monday state Secretary of Public Health Adrián Medina announced teenage vaccination clinics in Mexicali, Tijuana, Ensenada and San Quintín.

In the state’s capital city vaccination took place from 8 a.m. to 3 p.m. at the Fairgrounds. The authorities plan to administer more than 23,000 vaccines here.

State Sec. Medina said the authorities have over 125,000 Pfizer vaccines to get administered to teenagers. Minors must register online and provide an identification card and must be accompanied by an adult.