Actually, the whole world is the control group because vaccince with Fujian/411/2002 has not been produced yet. It (probably will be represented by Wyoming/3/2003)will be in the vaccine for the southern hemisphere.
About 70% of those immunized with Panama/2007/99 have titers of &greater than 40 against Fujian
Panama offers some protection, but a vaccine made with Fujian-like virus would be better.