viernes, 24 de abril de 2009

Influenza News



Friday, April 24, 2009

Influenza in Mexico

This is today's hot hot hot topic on the internet, the media is picking up on the news that a large number of people have been infected by influenza or swine flu in Mexico. Reports indicate various numbers of deaths from the infection (I've read so many different articles that I hate to put a number on it, some say 20, some say 60, it's hard to know what is accurate) and hundreds are ill. The reported cases appear to be focused around Mexico City and the central part of Mexico. Mexico City has canceled classes in schools and many cultural events have been postponed. The citizens of Mexico City are taking precautions against the infection, photos show people wearing surgical masks and reports suggest that the city is "paralyzed".
Currently, as of this moment on Friday afternoon, there have been zero cases reported in Quintana Roo and Cancun. The airport is apparently on alert, monitoring arrivals for indications of illness. (Not sure how much they can actually do, but reports say they are doing something). I've received a few emails already from people asking if they should cancel their trips. At this point, I would say no, come on down, the water is fine.


Twitter is absolutely abuzz with the topic, following #influenza has been interesting, people cracking jokes and spinning conspiracy theories, suggesting it's a government ploy to direct attention away from the country's problems or that it's just another play by the media to smear Mexico's reputation. Gives the tweeple something to talk about anyway, I'm finding it quite entertaining.

The truth of the matter is that yes, there are many people in central Mexico affected by the infection, but for now, all is clear in Cancun and Quintana Roo.
The national laboratory in Winnipeg has confirmed human swine influenza virus in clinical specimens sent from Mexico for testing, Canada's health minister said Friday.

"Today we have received … results which confirm that the virus is human swine influenza,'' Leona Aglukkaq told a press conference in Ottawa.
Mexico sent 51 specimens for testing to Canada's National Microbiology Laboratory on Wednesday. Sixteen positives of swine flu were found among the samples, according to a source who spoke to The Canadian Press news agency.
Mexican Health Minister Jose Angel Cordova said Friday that 20 people were killed in the outbreak and 1,004 were infected throughout the country, prompting the World Health Organization to convene an emergency meeting Saturday.
Officials closed schools, museums and libraries in Mexico City on Friday to limit spread of the virus.
Dr. Rich Besser, acting head of the U.S. Centers for Disease Control, said early analysis of Mexican samples of the virus showed it is very similar to those responsible for eight American cases, one confirmed Friday. All the U.S. victims have recovered.
While a handful of cases of flu-like illness are being monitored in Canada, "there have been no confirmed cases of human swine influenza yet," Dr. David Butler-Jones, Canada's chief public health officer, told the Ottawa press conference Friday.
Canada is working with Mexican and U.S. health officials to confirm that the virus in both countries is linked and is in fact a new strain of human swine influenza called H1N1, he added.
"This is an interesting virus. It's a brand new virus, not only to humans but to the world," said Dr. Frank Plummer, scientific director of the Winnipeg lab.
"About 80 per cent of the virus is highly related to a North American body of swine flu that's been around for a number of years, but about 20 per cent of it comes from an Eurasian variety of swine flu first seen in Thailand, so it's recombined to create something totally new. How it did that, where it did it, when it did it, I don't think we know yet."

Pandemic criteria
A pandemic is the sustained human-to-human transmission of disease over a wide area. To declare a pandemic, the WHO considers three factors:
1) Is the virus new?
The U.S. Centers for Disease Control said the current strain of swine flu includes genetic material from four sources: North American swine influenza viruses, North American avian influenza viruses, human influenza virus and swine influenza viruses found in Asia and Europe — a new combination that has not been recognized anywhere in the world before.
2) Does it cause severe disease? The eight ill people in the U.S. have all recovered, with one requiring hospitalization. But the WHO also needs to weigh the deaths and more severe illnesses in Mexico.
3) Does it move easily between people? There appears to be human-to-human spread in both the U.S. and Mexico over a wide geographic area at this point, but investigators are still checking for direct contact with swine.
WHO spokesperson Gregory Hartl said the agency needs to determine whether the outbreaks constitute an international public health threat.
Alert level unchanged
Hartl also said 12 of 18 samples taken from victims in Mexico showed the virus had a genetic structure identical to that of the virus found in California earlier this week. But he said the agency needs more information before it changes its pandemic alert level, which currently stands at three on a scale of one to six.
The virus was first reported earlier this week as U.S. health officials scrambled to deal with the diagnoses of seven people with the never-before-seen strain in Texas and California. The states share a border with Mexico not far from a town where two deaths were reported.
Hartl said health officials are dealing with three separate events in Mexico, with most of the cases in and around the capital, Mexico City.
Most of the cases have occurred in healthy young adults, he added.
"Because these cases are not happening in the very old or the very young, which is normal with seasonal influenza, this is an unusual event and a cause for heightened concern," Hartl said in an interview from WHO headquarters in Geneva.
It is also rare to see such high flu activity so late in the season, he said.
"The end of April, especially in a place like Mexico, you would think that we would see quite a steep decline," said Hartl.
On Thursday, Canadian health officials issued an advisory warning travellers who have recently returned from Mexico to be on alert for flu-like symptoms that could be connected to the illness.
People infected with the virus initially suffer flu-like symptoms that include:
Fever.
Cough.
Sore throat.
Muscle and joint pain.
Shortness of breath.

The illness may elevate to a severe respiratory illness within about five days.
In Canada, the advisory includes the same advice given to all travellers: Get a flu shot and take precautions such as covering coughs and staying home when sick. But it also gives locations in Mexico where cases of severe respiratory illness have occurred.
However, tourists returning from Mexico who feel well don't need to see a doctor, Butler-Jones said.

No hay comentarios: