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.
Asta e o mare problemă de mulţi ani, de fapt de la sfârşitul anilor '80, când acarianul Varroa a apărut şi a adus cu el mulţi viruşi, bacterii şi boli fungice.