During a state of public health emergency, the public health authority may exercise the following emergency powers over persons as necessary to address the public health emergency.

(a) Vaccination. To vaccinate persons as protection against infectious disease and to prevent the spread of contagious or possibly contagious disease.

(1) Vaccination may be performed by any qualified person authorized to do so by the public health authority.

(2) A vaccine to be administered must not be such as is reasonably likely to lead to serious harm to the affected individual.

(3) To prevent the spread of contagious or possibly contagious disease the public health authority may isolate or quarantine, pursuant to ‘ 19604, persons who are unable or unwilling for reasons of health, religion or conscience to undergo vaccination pursuant to this Section.

(b) Treatment. To treat persons exposed to or infected with disease.

(1) Treatment may be administered by any qualified person authorized to do so by the public health authority.

(2) Treatment must not be such as is reasonably likely to lead to serious harm to the affected individual.

(3) To prevent the spread of contagious or possibly contagious disease the public health authority may isolate or quarantine, pursuant to §19604, persons who are unable or unwilling for reasons of health, religion or conscience to undergo treatment pursuant to this Section.