That seems to be what happened to a British man who was suffering from swollen lymph nodes and unexplained weight loss. He was diagnosed with Hodgkin lymphoma, a cancer most common in people between the ages of 20 and 40, and those over 55. Then the ailing 61-year-old started wheezing and having difficulty breathing. He tested positive for COVID-19. His case was so severe that he was admitted to the hospital. The lymphatic system is the part of the immune system that helps fight infections with white blood cells. Think of white blood cells as soldiers, always alert and ready for a fight. They flow through the bloodstream to fight viruses, invasive bacteria, and anything else foreign that could threaten your health. White blood cells are made in bone marrow and stored in the blood and lymph tissues. When you have cancer in your blood—including leukemia and lymphoma—it develops in …