The move comes after a number of children in Hanoi have recently been diagnosed with pertussis.
The Health Department told hospitals and health centres to instructthe community on ways to identify the disease and prevent its spread.
Hospitals have been asked to stock adequate medications and necessary equipment for treating patients.
Authorities are also calling on parents to bring their children to health centres for vaccinations.
Pertussis is caused by the bacteria Bordetella pertussis. It is anairborne disease which spreads easily through coughs and sneezesof an infected person.
Whooping cough occurs mainly in infants and young children who are not vaccinated.-VNA