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.
Rating Newest Oldest. Best Answer: Adults should be given a routine booster dose of Td every 10 years. http://vaccineinformation.com/tetanus/qa... Source(s): http://vaccineinformation.com/tetanus/qa... Every 10 years. I think it's every ten years but you can go longer. I was at the doctors office getting a piece of glass removed from my foot (they had to numb it and cut it open and gah...) so they checked the last time I had the shot to see if it needed updating. It was right at five years, so they didn't update it.