Human lice 'can harbour the plague' and spread it by biting through our skin
![Human lice 'can harbour the plague' and spread it by biting through our skin](https://i2-prod.dailystar.co.uk/incoming/article32877145.ece/ALTERNATES/s615/2_Itchy-Scalp-from-Head-Lice.jpg)
Rats and fleas usually take the blame for spreading the plague but a team from the US National Institute of Allergy and Infectious Diseases states that human lice could also be culprits