about the harm they can do there's a post protecting because we're talking right now here is that parry aftab i will make it in can you call it 19 what i will that could be that seeing that was passe prof play on humans could be dangerous for an exact weight that this case where i think they simply made that scene in fact in some 40000 people with polio and here like 200. yeah we have to to be very clear about what kind of exene we are talking about if you talk about a vaccine which is an inactivated guy was which could theoretically be also contaminated with still alive and infectious viruses then you write that could be a danger safety is not says sufficiently. if we talk about them on a vaccines. probably know how to humans we have to know those kind of fixin's so far not in the market for any kind of human vaccine so with that 19 m. on a vaccine would be the 1st of its kind. in the market if it comes to maturity and the next seems like i was like particles again we use an approach which is so to say the backbone is the same as it is applied for i have but it has be vaccine so we know abou