Fact1: priest turns out to be infected, Fact2: Jim flees attracting attention of more infected but survivors, Fact3: virus had been reported in Paris and New York City as well, Fact4: Selena and Mark accompany Jim to parents house in Deptford, Fact5: Frank At is infected when drop of blood falls into eye deserted blockade
Output: 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 rageinducing 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, 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 where a mass suicide has taken place, aside from two infected who are alerted by him saying Hello? He then finds a priest, who turns out to be infected. Jim flees, attracting attention of more infected, but survivors Selena and Mark rescue him. At their shelter, they explain to Jim that while he was in a coma, a virus had spread quickly among the populace, resulting in societal collapse. They claim the virus had 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 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 and his daughter Hannah – who allow them to take shelter. The next day, Frank informs them that their supplies – particularly water – are dwindling. He plays them a prerecorded 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 Franks cab and head to Manchester, bonding with one another during the trip. At the deserted blockade, Frank is infected when a drop of blood falls into his eye. He is killed by the arriving soldiers, who take the remaining survivors to a fortified mansion under the command of Major Henry West. West reveals to Jim that his answer to infection entails waiting for the infected to starve to death and luring female survivors into sexual slavery to repopulate the world. The group attempts to flee, but Jim is captured and chained next to Sergeant Farrell, a dissenting soldier. Farrell shares with Jim his speculation that the virus has not spread beyond Great Britain and that the country is being quarantined. The next day, the soldiers prepare the girls for gang rape, while two soldiers lead Jim and Farrell to execution. When his executioners argue after killing Farrell, Jim escapes. Jim lures West and another soldier to the blockade, where Jim kills the latter and leaves West stranded for arriving infected. He runs back to the mansion and releases Mailer, an infected soldier West kept for observation. Mailer quickly spreads the infection among the soldiers in the mansion. In the confusion, Corporal Mitchell drags Selena upstairs to rape her, but Jim interrupts and kills him. The two reunite with Hannah and run to Franks cab. Jim is shot by West, who has been waiting inside the cab. Mailer grabs West through the rear window of the cab and kills him. The trio finally leave the mansion. Another 28 days later, Jim is recovering at a remote cottage. Downstairs, he finds Selena sewing large swaths of fabric when Hannah appears. The three rush outside and unfurl a huge cloth banner, adding the final letter to the word HELLO laid out on the meadow. A lone fighter jet flies over the three survivors, the infected are shown dying of starvation, and the pilot calls in a rescue helicopter.