गावसोरनि रैखाथिगोनां बिफावआव जाफुंसारनो, टिकाफोरखौ बैसोनि सिगांआव होनांगोन जेब्ला सनदेरथिया गावनोगाव नुजानो हागौ।
To be successful in their protective role, vaccines should be given before the age when the infection itself is likely to occur.