孤独患者孤独病毒
[gū dú huàn zhĕ gū dú bìng dú]
The word '患者' means patient or sufferer. And '病毒' stands for virus. Here, both elements describe loneliness as an infectious and hard to overcome situation. The netizen with this name implies that being lonely makes them feel like they're sick because the loneliness keeps on spreading just like a virus. It suggests they are deeply influenced by loneliness.