जेब्ला भेक्टरनि रोजाथिया गोबां जायो दैज्लां आरो दैज्लांनि उन समावबो महामारिया गमामायै समब्रा - समब्रि गोरोबलांफायो ।
Epidemics usually coincide with the monsoons and post monsoon period when the vector density is high .