सनदेरथाव सम-फारिया जाहाबनाया नुजानायनि थाम सानफोर फ्राम आगोलनिफ्राय गासै सिथरफोरा दाखोन महर-लानाय सिमहालागै जोरो।
The infectious period lasts from about three days before the rash appears until all the blisters have formed scabs.