But if you only have a slight astigmatism -- your doctor may refer to it as a degree -- and you donât have another vision problem, you may not need them. Irregular astigmatism is far less common and is linked to problems with your cornea, the front part of the eye.
Malaria is one of the most infectious diseases in history. It has infected countless people across the globe and it still kills millions every year. The malaria parasite lives in the gut of the Anopheles mosquito and is transmitted through the bug's bite.
The overall risks of the three most common blood-borne viruses being transmitted by an infected patient to a healthcare worker (HCW) have been estimated, as shown in the table below. Hepatitis B is the most readily transmitted virus and human immunodeficiency virus (HIV) the least. Healthcare workers are at greater risk of infection from patients than vice-versa. The UK rates of transmission may appear to be higher than in other countries.