Sorry you had to experience that as well. I was diagnosed at the end of January 2020. I am ALK+. I am so thankful that they figured out how someone can do the draining at home. My right catheter was placed before covid and my left one was placed after covid. It helped in not having to have to go in for a thoracentesis every other week during covid too. My pulmonologist didn't have an answer for why I had the fluid for so long. He told me everyone is different and will react to treatments differently.