Positive shick’s test indicates that person is :
Shick’s test

Intradermal test which provide information regarding :

a. Immune status, b. Hypersensitivity & susceptibility to diptheria toxin before giving active immunization.

 In one arm toxin is injected (test arm) and in other arm heat inactivated toxin is injected (control arm).
Immune to diphtheria
Hypersensitive to diptheria
Susceptible to diptheria
Carrier of diphtheria