''A chickenpox outbreak in Cox's Bazar Rohingya camps has raised a public health concern in the region, officials say. The number of patients with chicken pox, also known as varicella, reported last week was 5,376, which is more than double the number reported the week before, according to a World Health Organisation report published on Thursday. Chickenpox cases had earlier been reported on several occasions, but more and more cases kept coming since the second week of January. As many as 10,240 cases were reported between January 2018 and January 31 this year. Of them, 9,972 cases were reported last month...''