The move came after Rwanda confirmed the Marburg virus disease on September 27.

According to the WHO, as of October 11, Rwanda had recorded 58 cases and 13 deaths from the Marburg virus disease.

The WHO has assessed the risk of this outbreak as very high at the national level, high at the regional level, and low at the global level but advised all countries to refrain from implementing any travel and trade restrictions with Rwanda.

According to the HCDC, the risk of the Marburg virus entering the city through air travel is low as there are no direct flights from Rwanda and any incoming passengers who have transited or visited Rwanda will be carefully screened.

Transport times from Africa to HCM City by sea take 25-40 days, while the longest incubation period for the Marburg virus disease is 21 days.

"Although the risk of Marburg virus entering the city remains low due to logistical factors, it cannot be entirely ruled out," HCDC warned.

On October 11, the Ministry of Health mandated measures to prevent and control the disease at border gates.

The Marburg virus is highly virulent and can cause hemorrhagic fever.

People are initially infected with the virus when they come into close contact with Rousettus bats, a type of fruit bat that can carry the Marburg pathogen and is often found in mines or caves.

The virus spreads through direct contact with broken skin or mucous membranes, as well as through contact with infected people's blood, secretions, organs, or other bodily fluids.

It can also be transmitted via contaminated surfaces and materials, like bedding and clothing.

According to the WHO, the incubation period varies from two to 21 days, and the illness can begin abruptly, with high fever, severe headache, and severe malaise.

Watery diarrhoea, abdominal pain, cramping, nausea, and vomiting can manifest themselves on the third day.