Changes in body weight of mice injected subcutaneously once with Narita/09 (A) or Sw/Hok/81 (B) vaccine after the challenge with Narita/09. Data are shown as mean body weight ± standard error. ES: ether split, WV: whole inactivated. †: Mice died.
Okamatsu et al. Virology Journal 2013 10:47 doi:10.1186/1743-422X-10-47