Although it is not as serious as malaria, it is spreading rapidly in many parts of the world, killing about 20,000 people a year and infecting hundreds of millions.
"We assure the public that as per the Department of Health (DOH) there is now no reported case of severe dengue infection to the individuals who received one dose of dengue vaccine a year ago", Roque said in a statement.
Khristine Estrada-Cabanayan, a Sanofi spokeswoman in the Philippines, said the company is working closely with the Department of Health and will release a statement to address concerns regarding the vaccine. Ruby Dizon, a medical director at the French firm.
Philippine Presidential Spokesperson Harry Roque on Monday said that "people should not panic over the dengue vaccine" as the government was looking into the matter.
The immunisation program is in line with the recommendation of the World Health Organization for mass vaccination in highly endemic countries, health officials said on Friday.
For those who were not previously infected by the dengue virus, the analysis found that vaccination prevented severe illness for at least 30 months, Duque told reporters.
Sanofi Pasteur said Dengvaxia did provide persistent protective benefit in those who had previously had dengue.
"Potentially adding 5 dengue hospitalizations or 2 clinically severe dengue episodes per 1,000 vaccinees", the presentation showed.
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He added: "The vaccination program is not a clinical trial and Pinoys are not guinea pigs".
More than 730,000 children could be at risk after being given a vaccine which could make Dengue fever worse.
Ng assured the public that all study participants who got severe dengue, whether vaccinated or not, have fully recovered.
The company said it would ask the authorities in countries where it has been approved for use, including in Singapore, to update their information on the vaccine, and to disseminate it to doctors and patients.
Dengvaxia had been administered to more than 700,000 public school children from Central Luzon, Calabarzon and National Capital Region.
Aguirre called on the parents of the children vaccinated with Dengavia to reach out to the NBI to help with the probe.
Aguirre questioned the Aquino administration's move to spend billions to fund the immunization program.