A vaccine with high efficiency and safety Traditionally, vaccine development involves tradeoffs between how quick it works and safety. The life-attenuated vaccine made from weakened pathogens tends to make human body immunes fast. However, it can also be dangerous due to the difficult of dose control and individual differences. Inspiringly, scientists from University of Texas invented a vaccine for chikungunya fever which is both efficient and safe. This vaccine made from an insect-infected virus which is no harmful for human but can activate our immune system to produce antibodies for chikungunya fever. Experiments were done in mice and non-human primates; results were perfect. I appreciate your reading and look forward to your advice!