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.
수년간 심각한 문제로 떠올랐는데요 80년대 후반에 바로아 응애(진드기 일종)가 각종 바이러스와 박테리아와 진균성 질병을 들여왔거든요