An infestation in one apartment can spread throughout the building. It's also important to realize they're not only in the walls, ceilings, and bedding. Bed bugs can seek refuge in boxes and suitcases and remain their long after the rest of them have been exterminated.
Bed bugs, a problem worldwide, are resurging, causing property loss, expense, and inconvenience. The good news is that bed bugs do not transmit disease. The best way to prevent bed bugs is regular inspection for signs of an infestation. Image: Bed bugs hiding in the ribbing of a mattress corner.
Another requirement is any bedbug bite, would have to penetrate to the blood of the human body, i don't know about bed bugs, so I don't know if they can bite like that. For the record, HIV is the virus which is transmitted, and if in the body long enough it causes AIDS (a disease). People don't transmit AIDS, they transmit HIV.
Bed bugs can spread from one room or apartment to another through door frames, windows, or holes or cracks in the walls, ceilings and floors. They can contaminate wood furniture by laying eggs in cracks and recesses, and when that furniture is moved, these eggs (which can stay viable for years) may hatch in a new location.
Live HIV can be recovered from bed bugs up to 1 hour after they feed on infected blood, but no epidemiologic evidence for HIV transmission by this route exists (20-22). This study has certain limitations.
Human immunodeficiency virus. HIV has never been found in wild bedbugs. HIV survived for 8 days after experimental feeding, with no replication in bedbugs, and has never been observed in bedbug feces. Transmission assays from bedbugs to laboratory animals failed, despite very high virus concentrations.