According to Rule 198 of WBSR, Pt.-1 When a contagious disease occurs in the family or household of a teacher/ employee of a school. So that no one else in the school is infected with that contagious disease by that teacher, then that teacher has to take "Quarantine leave". "Quarantine leave" is granted due to which infectious diseases? Scarlet fever   Plague (Bueekmonic bubonic),  Typhus Cerebro-Spinal meningitis Small-pox may be deliberated as contagious disease, chicken-pox shall not, however, be calculated as infections disease if not the M.O. or Public Health Officer considers that because of suspicion as to the true nature of the disease e.g. small-pox, There are reasons for giving such leave. For persons employed in the readiness and parcelling of food the following surplus diseases shall also be treated as contagious Dysentery Enteric fever  Typhoid fever  Malta fever Paratyphoid fever. What is the main condition for granting "Quarantine leave"? To