[Virus gauge]

The vrus gauge on the status screen shows the player's virus infection rate. If it reaches 100%, the player dies regardless of his/her remaining vitality.

[Crawling part 1]

If you receive too much damage, your player will start crawling on the floor. While you are crawling, you can't enter certain rooms and perform certain tasks.

[Crawling part 2]

While you are crawling, your virus gauge increases at a much quicker rate than normal. To avoid having to crawl, you must a recovery item or have other PCs "shoulder" you up.