It's called the flu. Happens every year.
I wouldn't say that it is describing the flu at all. I would say it more aligns to the Cova 19 symptoms. Have you seen the images of someones lungs after they have succumbed to this virus. they look like they went through a meat grinder. Additionally, there is no cure or treatment for Cova 19. These seem to align to her description much more than the flu.
As to whether Silvia was referring specifically to the Cova 19, I don't know. Could be a lucky guess. But I wouldn't call it the Flu, which we do have treatments for.