Fighting zika and other viruses

World-renowned New Zealand virologist Professor Robert Webster is a pioneering virologist who helped identify the avian strain of influenza. Based at St Jude Children's Research Hospital in Memphis, he's delivering a lecture tonight at Auckland University on the likelihood of a lifetime innoculation against the flu virus. His visit here is sponsored by the University of Otago's Webster Centre for Infectious diseases. Lynn Freeman talks to Professor Webster about ever-mutating flu strains as well as the rampant spread of the Zika virus.