The hygiene hypothesis is actually quite controversial because it's thought that our exposure to microbes isn't the only factor, says Cody Warren, a virologist and immunologist who is a postdoctoral fellow at the University of Colorado Boulder.
Fungidziro inoshandiswa patsvakurudzo dzezvehutsana a iyi ine vanhu vanoyiona nenzira dzakasiyana siyana pasina kuwirirana nekuti zvinofungidzirwa kuti kusangana kwatinoita nehutachiona hunokonzeresa zvirwere hachisiri chinhu chimwe choga chinokonzeresa zvirwere, anodaro Cody Warren, hutachiona hunokonzera zvirwere nekuongorora mashandiro anoita masoja emumuviri pakudzivirira zvirwere,  uyo ari kuita zvimwe zvidzidzo zvapamusoro munyaya idzi ari paUniversity of Colorado Boulder.