Student or Learner
Whatever attacked you, it would seem to be gone.
Could you explain "would" here?
He could have said, "It's gone" or "It seems to be gone". But he doesn't want to sound too sure about it, and perhaps he hasn't been asked his opinion.
You know about the politeness function of "would". It's not really necessary for the sentence to make sense. "I would like a cup of tea = I want a cup of tea".
It has the effect of saying, "If you want my opinion ... If you don't mind me saying ... If you were to ask me ... then I would say, "it seems to be gone".