at portadown research centre in wheelchair vaccine trials on animals are due to start this week.ty trials in humans are expected to begin next month at 0xford expected to begin next month at oxford university. —— porton down in wheelchair. it is an urgent challenge on which so many lives depend. —— wheelchair. apart from a vaccine, the other weapon scientists are telling us is vital in the fight against covid—i9 is social distancing, to stop the virus from spreading. we're joined by robert booy, who's a professor of infectious diseases at the university of sydney. thank you forjoining us. social distancing is something we are all having to get used to, tell us how important it is? it is incredibly important. we just is? it is incredibly important. wejust don't is? it is incredibly important. we just don't have a vaccine now, but the effect of a vaccine can be induced by social distancing. because by stopping the transmission of the virus, we can do what a vaccine does and keep people safe from each other. and yet so safe from each other. and yet so many of us are just not good at