Vaccines YES or NO

Hello, since I know this is a controversial topic I am not trying to step on anyone's toes. I have two children who have been vaccinated since birth. I lost my step son in April due to an unexplained death after receiving his shots four days before hand. Now not saying this is the cause but it made me look into vaccinations. I was just wondering if there are any ladies who have children or who are choosing not to vaccinate and why? I am really interested in getting the most information to make a decision with our baby on way. This is not to start any arguments just wanting to see people's different opinions on the subject and some insight from both parties.