Do electric fields affect humans?
Yes of course they can effect Humans.
We know that when our hair are dry then they get charged due to rubbing with any dry cloth due to the accumulation of charges in it.
Similarly our body when placed in an external electric field will result charges to accumulate in our body, which may iduce some current in our body.
The best example is if we touch a Van de Graff Generator then our hair will stand due to the Electric field generated by it as shown in the pic below :-