MANILA -- Ormoc City in Leyte province was placed under a state of calamity due to a rise in the number of dengue cases, Mayor Richard Gomez said Thursday.
The city tallied 426 cases of dengue from January 1 to August 8, said the local disaster office.
A state of calamity will allow local officials to tap emergency funds.
Nationwide, dengue incidence shot up 98 percent from a year earlier to 146,062 cases from January 1 to July 20, causing 662 deaths, Health Secretary Francisco Duque said in a news conference in which he announced a "national dengue epidemic" earlier this week.
Manila banned the sale, import and distribution of the Dengvaxia vaccine in February following the deaths of several dozen children who were among more than 700,000 people given shots in 2016 and 2017 in a government immunization campaign.
Duque said the government is studying an appeal to allow French pharmaceutical firm Sanofi to Dengvaxia back in the Philippine market, but ruled out using the drug to combat the ongoing epidemic which has hit small children hard.
"This vaccine does not squarely address the most vulnerable group which is the 5-9 years of age," Duque said.
The vaccine, now licensed in 20 countries according to the World Health Organization, is approved for use for those aged 9 and older.
Duque said the United Nations agency also advised Manila that the vaccine was "not recommended" as a response to an outbreak, and it was anyway "not cost-effective" with one dose costing about P1,000.
Dengue, or hemorrhagic fever, is the world's most common mosquito-borne virus and infects an estimated 390 million people in more than 120 countries each year -- killing more than 25,000 of them, according to the WHO.
The Philippines in 2016 became the first nation to use Dengvaxia in a mass immunization program.
But controversy arose after Sanofi disclosed a year later that it could worsen symptoms for people not previously infected by the dengue virus.
The disclosure sparked a nationwide panic, with some parents alleging the vaccine killed their children.
The controversy also triggered a vaccine scare that the government said was a factor behind measles outbreaks that the UN Children's Fund said have killed more than 200 people this year.
Duque on Tuesday called on other government agencies, schools, offices and communities get out of offices, homes and schools every afternoon to take part in efforts to "search and destroy mosquito breeding sites".
With reports from Agence France-Presse; Jenette Ruedas, ABS-CBN News