Human papillomavirus, or HPV, has a strange reputation. You might know of it as a sexually transmitted infection that causes uncomfortable warts, the papilloma, but you also might have heard that it can lead to a deadly form of cancer. Both are actually true, as is the possibility that you can have HPV and experience no symptoms whatsoever.
SICK is a new series that looks at how diseases actually work inside our body. We'll be visiting medical centers and talking to top researchers and doctors to uncover the mysteries of viruses, bacteria, fungi and our own immune system. Come back every Tuesday for a new episode and let us know in the comments which diseases you think we should cover next.