Pathological and Virological Analysis.

aVaccine (3 µg) administered at weeks 0 (1 dose) or week 0 and 3 (two doses).bParticle forming untis (pfu) per milliliter (ml) in the lungs of mice at day 3 post-challenge. cPercentage of original weight at day 6 post-challenge.dActivity score. 0 = Full activity. 1 = slow to respond to touch, but still mobile. 2 = little response to touch.eDyspnea. 0 = no shortness of breadth. 1 = heavy breathing and shortness of breadth.fPercentage of mice that survived challenge at day 8 post-challenge.