Australian firm CLS Ltd. began tests of their Mexican Swine Flu virus on 240 adults.
US based Baxter International, Switzerland’s Novartis and another Australian company Sanofi-Aventis SA are also planning to enter human test trials in August.
Experts warn that each person will probably need two shots to provide immunity .
In these trials CSL is giving , volunteers aged 18 to 64 years two shots, three weeks apart, to determine how many doses are needed to get the right level of protection, David said.