But inserting genes into mammalian neurons inside an intact brain required a larger number of more virulent viruses. (discovermagazine.com)
Creating highly virulent viruses in the lab is controversial, says virologist Ab Osterhaus of the Erasmus University Medical Center in Rotterdam, the Netherlands.» (sciencemag.org)
«In our studies, puppies vaccinated annually with modified live CPV - 2, CDV and CAV vaccines received no added benefit from annual revaccination throughout a period of 7 years when compared to dogs that were vaccinated as puppies then challenged with virulent virus at 7 years of age. (caberfeidh.com)