The WHO recommends complete withdrawal of the oral polio vaccine (OPV) by April 2016 globally and replacing with at least one dose of inactivated poliovirus vaccine (IPV). However, high-cost, limited supply of IPV, persistent circulating vaccine-derived poliovirus transmission and need for subsequent boosters remain unresolved.  Now, a study from researchers led by the University of Pennsylvania develops an oral vaccine booster by manipulating plants to … Continue reading Researchers develop plant-based Polio booster vaccine.