ADELAIDE, Australia (AP) - The world's first human trials of a swine flu vaccine have begun in Australia.
Two biotechnology companies report they're injecting hundreds of adult volunteers with trial vaccines in the southern city of Adelaide.
One researcher says the trials are well suited to the southern hemisphere, because that's where a surge of cases has been reported. He says places like the U.S. "won't have to worry" about the virus until traditional flu season hits.
The vaccine trials are aimed at controlling the virus that has so far killed more than 700 people worldwide. In Australia alone, there have been more than 14,000 confirmed cases.
There's hope that at least one of the current flu vaccine trials could lead to distribution of a vaccine as early as October.