Viral arthritis just means that your body has responded to a viral infection by producing pain and inflammation in the joints. Without knowing which virus has caused it, it's pretty much impossible to say what may happen with it in the future. As to did you catch it - you did catch the virus somehow, but you don't "catch" the more usual forms of arthritis.

The term "arthritis" just refers to joint inflammation and there's many, many different types of arthritis... it's a part of med-speak that isn't well understood. I've been diagnosed with "serum-negative rheumatoid arthritis", but that's essentialy med-speak for my joints hurt and we haven't got the foggiest clue of why... Which is also part of why "viral arthritis" isn't terribly informative and isn't at all indicative of what may happen in the future. By saying "viral arthritis" all your doctor is saying is that you have sore joints as a result of a viral infection, not that you've been diagnoses with a condition you're going to have for the rest of your life.

Afraid I can't help with the blood infection or the liver problems - simply not enough information, but it's possible that the virus you have is also impacting on the liver. Things like ross river fever and barmah forest virus cause joint pains and can also effect the liver.

BW