While the terrestrial world suffered from coronavirus, no less dramatic events are unfolding in the underwater world. Bivalve molluscs are being mowed down by an “epidemic” of a tumor disease similar to human leukaemia.
The only, if one can even put it that way, positive feature of human oncological diseases is that they are not contagious in themselves: cancer cells cannot be transmitted from one person to another and provoke a tumor in them. Unfortunately, there are exceptions here too, but these are either extremely rare cases of transmission during organ transplantation, or it concerns oncogenic viruses (for example, papillomavirus), which sometimes create a picture of “infection” with cancer, although in reality only the oncogenic virus is transmitted. But human cancer cells themselves are not transmitted from person to person. However, some animals are less fortunate: true contagious cancers are known in several species — infection occurs through the transmission of cancer cells themselves. More details:https://elementy.ru/novosti_nauki/433850/Zaraznyy_leykoz_obnaruzhen_v_dalnevostochnoy_populyatsii_midiy_Mytilus_trossulus
