The LSE campus itself is very safe. There is never a time, day or night, when students will feel uncomfortable walking by themselves. The only crime that exists usually takes place in the library, and that crime is usually theft. Students have to be wary of leaving their belongings unattended or else they might get stolen. Physical safety on campus, however, is certainly not a concern. That being said, the second you step off campus, for whatever reason, whether it is going out at night or simply returning to your dormitory, you are in the city of London, and anything goes. Luckily, the campus is in a safe area of the city, so nothing usually happens near school. Most of the reports of serious crime, like muggings, occur very late at night when students are enjoying a night out on the town in areas far removed from campus. These occurrences are few and far between, and since London streets are under the constant surveillance of CCTV (closed-circuit television), potential criminals are usually deterred from doing anything illegal.
Whenever there are students living together in close quarters like dormitory situations, illnesses are bound to travel quickly—and the LSE is no different. When students do get sick, they are forced to rely on the United Kingdom's National Healthcare System because the LSE does not provide any sort of student health center—this means a visit to your local doctor when you catch a cold and a trip to the emergency room for something more serious. The good news is that you won't have to pay a dime; the bad news is that you might be waiting in line for a long time.