A mutation in the A(H1N1) virus has been observed in several countries, including Hong Kong, China, Japan, Brazil, Mexico, Norway, Britain and the United States, according to the World Health Organization (WHO). As such, scientists are constantly monitoring A(H1N1) cases for potentially harmful flu strains.

Worldwide reports

In Norway, an A(H1N1) mutation has been found in two fatal cases and one severely ill patient. The country's Institute of Public Health warns that the mutation "could possibly…cause more severe disease because it infects tissue deeper in the airway than usual". However, the mutation does not appear to be widespread.

Meanwhile, China has eight victims of a mutated A(H1N1). But according to the Chinese National Influenza Center, this mutation responds to drugs and may be prevented by vaccines. These cases were also said to be found in "isolated" cases in the mainland only.

In the United Kingdom, there have been five confirmed reports of resistance to antiviral drugs. The United States reported four such cases as well. Experts are quick to add that in these cases, the virus seems to be resistant to medication because of the patients' "compromised immune systems".

Mutation is expected

Flu viruses tend to mutate easily. They are quite unstable and may change easily. While most mutations have no clinical significance, they are still under investigation. So far, there is no evidence yet linking these to an unusual spike in the number of A(H1N1) victims. But scientists are carefully studying these mutations and their possible effect on public health. The effectiveness of flu vaccines or antiviral drugs remains.

Groups susceptible to A(H1N1)

Certain groups of people are more at risk of contracting A(H1N1). These include pregnant women, the elderly, health workers, people with weakened immune system (such as cancer, HIV or diabetes patients), and children age 6 months to 4 years.

Aside from vaccinations, balanced diet, enough rest, and exercise, vitamins also help boost a person's defense against diseases. Children stand to benefit from the powerful combination of vitamin c and zinc, especially when their immunity foundation is not yet solid.