The world will soon see an â€œexplosionâ€ of swine flu cases as the H1N1 virus spreads rapidly around the world, a top World Health Organization official said Friday.
Spread of the virus is entering an â€œacceleration periodâ€ and it is certain that there will be more cases and more deaths, said Dr. Shin Young-soo, the organizationâ€™s regional director for the Western Pacific.
â€œMost countries may see a doubling of cases every three to four days for two months until peak transmission is reached,â€ he said at a symposium in Beijing. â€œAt a certain point, there will seem to be an explosion in case numbers. I believe it is very likely that all countries will see community-level transmission by the end of the year.â€
More than 1,490 people around the world have died from the virus since it emerged this spring, Shin said.
Swine flu is the first influenza pandemic in more than 40 years. So far, it has caused mostly mild illness â€” but Shin warned â€œthe virus has a sting in its tailâ€ because it is very infectious and â€œhas the potential to cause more serious disease.â€
Any widespread resistance to antiviral drugs, expected to be available this fall, could make the situation worse, he said.