21. His research lasted 40 years and resulted in FluMist, a cold-adapted, live attenuated, trivalent influenza virus vaccine . 22. Given that this is a live virus vaccine , there is a small but significant risk of serious complications, 23. The NIAID reported in 2012, that it had constructed a candidate virus for a live attenuated virus vaccine . 24. Since it is not a live virus vaccine , like the smallpox vaccine, it cannot give a person ebola. 25. Federal officials say there is no proof yet that killed-virus vaccines are effective in protecting people from smallpox. 26. And even if they do no harm, the killed virus vaccines often fail to rally a meaningful counter-assault. 27. The killed-virus vaccine does not need to be dried or frozen and can be refrigerated as a liquid. 28. Scientists are attempting to develop a recombinant human respiratory syncytial virus vaccine that is suitable for intranasal instillation. 29. WI-38 is now used for the production of all of the Rubella Virus vaccine used in the Western Hemisphere. 30. A common cause of death is canine distemper, which develops following vaccination with a modified live distemper virus vaccine .
