For the longest time SIDS was always on the minds of any parents. It had a increase in the 80s for unknown reasons. Doctors advice was to place the infant in the prone position. Now it's the opposite. Keep babies on their backs. And so many studies have been conducted on SIDS. To a point where they recommend the use of boxes for baby to sleep in in Britain. I guess I say listen to your doctor, and medical staff when it comes to vaccines. I know I wouldn't want my child to get chicken pox, I always wondered how soon is too soon for baby vaccine. If mother was vaccinated how does that transition to baby. Can mother receive booster shots so baby doesn't have to get vaccinated.... All the scientific questions on the issue.