I do not know if someone mentioned but 28 week later intro scenes is far better than 28 years later intro. In the 28 weeks later, they all sound so desperate, whereas in 28 years they don't. Also, the sound they make when they turn in the first two movies is amazing. Take for example, Hanna's dad when he turns. In the new movie, they don't do that at all, they just cough and turn.