RE:RE:RE:RE:RE:RE:RE:RE:RE:RE:RE:RE:60% of the road = 270-daysHi Yajne...thanks. All the currently approved commercial vaccines are systemically administered & completely bypass the airway. The potential advantage of using an intranasal vaccine is that it can induce both airway/mucosal & systemic immunity (both antibody-mediated & cell-mediated). It also has the additional advantage of ease of administration...no shot required, which can be an issue with the needle-phobic & kids. Eventually, perhaps a shot and sniff could be utilized down the road to further maximize efficacy if needed ; )