The mobile medical teams of Bangladesh's health ministry will help deliver those services amid a highly challenging situation, Dr Poonam Khetrapal Singh, Regional Director for WHO South-East Asia, said.
"Vulnerable populations require access to health services, including emergency and basic healthcare. Access for women to reproductive health services is especially important," she said.
"Poor nutrition, communicable diseases (including vaccine-preventable and water-borne diseases), injuries and other concerns such as mental health provide immense public health challenges that the Ministry of Health, Bangladesh, WHO and other health partners are working to address," the World Health Organisation (WHO) statement said.
More than 380,000 people have gathered in makeshift or spontaneous settlements, the WHO statement said.
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The WHO South-East Asia Regional Health Emergency Fund (SEARHEF) grant of USD 175,000 will support 20 mobile medical teams to provide essential services for at least two months.
The grant is also being used to procure essential medicines and medical supplies to be distributed to pre- existing health facilities in Cox's Bazar area.
"Mass immunisation is one of the most powerful ways to keep vulnerable communities safe from communicable diseases, especially when overcrowding and inadequate access to safe water, sanitation and hygiene are present," Dr Singh said.