Wich strategy is used by public health to reduce the incidence of measles

Public health interventions to reduce the secondary spread of measles are vaccination of susceptible contacts; human immunoglobulin (Ig) for susceptible contacts; quarantine of susceptible contacts; isolation of active measles cases; and special vaccination clinics or activities during outbreaks

Explanation:

i believe it is the last one. im sorry if im wrong!

answer; 4% i believe this is correct;