Mexican authorities have taken drastic measures to contain a new strain of the swine flu virus that has killed 81 and prompted fears of a global pandemic.
More than 1,300 people with flu-like symptoms have been admitted to hospitals in Mexico, and officials are trying to determine how many of them have swine flu.
The H1N1 strain of swine flu is usually associated with pigs. When the flu spreads person-to-person, instead of from animals to humans, it can continue to mutate, making it a tougher strain that is harder to treat or fight off.
Symptoms of swine flu include fever, lethargy, lack of appetite, coughing, runny nose, sore throat, nausea, vomiting and diarrhea.
This outbreak is causing worldwide concern because it wasn’t dealt with immediately by the Mexican government. So far, New Zealand, California and Texas have found people who are infected with the flu.