No cap, and a 50% line
Vermont's comparative negligence statute, 12 V.S.A. 1036, lets you recover if your negligence is not greater than the defendants' total, and makes each defendant pay its own share. The Supreme Court explained in Stannard v. Harris (1977) that the statute leaves joint tortfeasors liable only severally.
The deadline for most injuries is three years under 12 V.S.A. 512, and malpractice has its own rule in 12 V.S.A. 521.