Can a disease kill another one?

[jaypolkam]

Can a pathology(I dont know if this is the correct term) kill an invading virus? I've been thinking about that amid this corona virus hysteria. My mother has miastenia gravis, a very rare disease, to make it brief, antibodies attack the host and external agents, instead of attacking only external agents, I've been thinking if there is a possibility of surviving the covid 19 thanks to the aggressive behavior of the immune system, killing every symptom or at least most? I am asking because the question appeared yesterday in my head but I found nothing in google about diseases killing other external agents. My mother rarely get a fever or any common flu, even with miastenia gravis.

[CharonY]

Well, there are certain diseases or conditions that makes it harder for pathogens to infect their hosts. Sickle cell anemia is such an example. However, the disease in question is an autoimmune disease. The antibodies in this process are specific to host components and therefore do not target pathogens. More commonly the reverse is likely true, an infection can trigger autoimmune diseases.