Mexico has seen a record number of cases of the H1N1 flu, and officials are warning that the spread of the pandemic is still too widespread to completely control.
The coronavirus, which is spread through coughing and sneezing, is thought to have caused more than 80,000 deaths across Mexico and forced authorities to suspend travel and health-care services across the country.
A number of recent cases have been linked to a Mexican tourist who died in January, prompting officials to declare a state of emergency.
More than 3,000 people have been hospitalized in the country and more than 4,000 have died, according to the latest figures from the Federal Bureau of Investigation (BND).
Mexican President Enrique Pena Nieto has called for a national mobilization to fight the virus, but has been criticised for not doing enough to stop the spread.
On Friday, Pena said he would seek a referendum to increase the number of days in which the country is able to take part in the vaccination drive.
However, the president said on Saturday that the country was in the midst of an emergency, and that he will ask for the vote.
“If we don’t get it done soon, we are going to have a huge, massive crisis,” Pena told a televised news conference.
“We need to stop it before we get into a situation that could lead to a situation where we can’t protect ourselves.”
He added that Mexico was facing an unprecedented crisis that had not been seen since the 1940s.
“It’s a massive crisis that has never been seen before,” he said.
The virus has caused widespread outbreaks of flu in some countries including France, Spain and Italy.
Mexico has reported more than 500 deaths from the coronaviruses, most of them from H1Ns.