Vaccines lower risk only 15%
Vaccination reduces the risk of death by 34% and Long Covid chronic health issues by only 15% in the six months following Covid infection.
These risks were 50-75% higher than for those without evidence of infection. Risk reduction was most evident for blood clots (56%) and lung issues (46%), but modest in other organ systems. Long Covid symptoms are similar regardless of vaccination.
Source: Long COVID after breakthrough SARS-CoV-2 infection | Nature Medicine