Please answer the following question: Please answer the following question about this movie plot. If it's un-answerable, please output "No answer". Question: Through what body fluids does the virus spread? Movie plot title: 28 Days Later Movie plot: In Cambridge, three animal liberation activists break into a medical research laboratory. A scientist in the lab desperately warns them against releasing the captive chimpanzees, which are infected with a highly contagious rage-inducing virus. Ignoring his pleas, the activists release a chimp, which infects a female activist. She then attacks and infects everyone else present. 28 days later, in London, Jim (Cillian Murphy), a bicycle courier, awakens from a coma in St Thomas' Hospital. He finds the entire hospital deserted. He wanders the streets of London, finding it deserted as well, with signs of catastrophe everywhere. Jim enters a church and finds a priest, who turns out to be infected. Jim flees, attracting attention of more infected, but Selena (Naomie Harris) and Mark (Noah Huntley) rescue him. At one of their safehouses, they explain to Jim that while he was in a coma, a virus spread among the populace, resulting in societal collapse. They claim the virus has been reported in Paris and New York City as well, suggesting the infection has spread worldwide. The next day, Selena and Mark accompany Jim to his parents' house in Deptford, where he discovers they committed suicide in bed together. That night, the three are attacked by more infected. Mark is bitten, and Selena viciously kills him. She curtly explains that the virus spreads through blood and saliva and overwhelms its victims in 10 to 20 seconds. She warns that should Jim become infected, she will kill him "in a heartbeat". The two see some blinking Christmas lights from Balfron Tower and head there. They discover two more survivors cab driver Frank (Brendan Gleeson) and his daughter Hannah (Megan Burns) who allow them to take shelter. The next day, Frank informs them that their supplies particularly water are dwindling. He plays them a pre-recorded radio broadcast from a military blockade near Manchester, claiming they have "the answer to infection" and promises to protect any survivors who reach them. The group board Frank's...
A:
Blood and saliva