Vaccination for longer and active immunity against this disease may be carried out during April-May as a preventive measure . इस बीमारी से अधिक लम्बे समय तक के बचाव के लिए अप्रैल व मई में टीके लगाये जा सकते हैं .
परिभाषा
a form of acquired immunity in which the body produces its own antibodies against disease-causing antigens
मोबाइल