From the article:
More than one year and four months have passed and the family has yet to receive his autopsy report. It turns out their son was given a vaccine not approved for his age and an extra dose of the hepatitis B vaccine that he shouldn’t have received until later on.
Anything can be dangerous when misused. It's a sad case of medical malpractice (assuming all is true) but not a case of "OMG vaccines are dangerous!!!!!!!!". There is a reason why vaccines are given at particular ages and spread out.