evidence: There are concerns, many of which circulate on the Internet, linking some vaccines to multiple sclerosis, sudden infant death syndrome (SIDS), and other problems. To date, studies have not shown any connection between vaccines and these conditions. SIDS cases have actually dropped by more than 50% in recent years, while the number of vaccines given yearly continues to rise. [...] The whooping cough (pertussis) vaccine also does not give lifelong immunity, and that may be one reason why outbreaks still happen. Whooping cough isn't a serious problem for older kids and adults, but it can be for infants and young children. Because of this, teens and adults now get a pertussis booster along with the tetanus and diphtheria booster (Tdap) — an important step in controlling this infection, particularly for pregnant women and other adults who will be around newborn babies. [...] And talk with your doctor about which vaccines your kids need. Working together, you can help keep your family healthy.