That means it would take 1,351,351.35 years, using data from the (thus far) fastest manned spacecraft. As others have touched on, proposed spacecraft can travel faster. exobio says. I think Project Orion (nuclear powered spaceships) can hit up to 10% of the speed of light so that means 500 years, I think.
Medicine and Healthcare. Adults should be vaccinated with the TDaP vaccine (for tetanus, pertussis and diphtheria) every 10 years, maybe less (it is not going to be harmful to vaccinate more frequently). For diseases like whooping cough (also called pertussis), the danger to adults may be as serious as it is to children.
1 Children (aged 11 years and older) and adults who did not get the Tdap should receive the vaccine followed by a tetanus and diphtheria (Td) booster every 10 years.2  Adults who have never received Tdap. Children (aged 11 years and older) and adults who did not get the Tdap should receive the vaccine followed by a tetanus and diphtheria (Td) booster every 10 years. 2  Adults who have never received Tdap.