Now this has been a huge problem for many years, basically since the late 1980s, when the varroa mite came and brought many different viruses, bacteria and fungal diseases with it.
To je velký problém již po mnoho let, v podstatě od konce 80. let, když se objevil kleštík včelí a spolu s ním se objevily různé viry, bakterie a plísňová onemocnění.