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.
Communicable diseases are transmitted from one source to another by infectious bacteria or viral organisms. Contagious diseases are very communicable, spreading rapidly from one person to another via contact or close proximity.Some germs are communicable and/or contagious, while others are not, i.e. food poisoning.Contagious, communicable or noncommunicable infectious diseases, posing a health risk, have always existed.otorious childhood contagious diseases commonly discovered running around the playground include: 1  rubella. 2  roseola. 3  scabies. 4  measles. 5  pink eye. 6  ringworm. 7  chickenpox. 8  scarlet fever. 9  fifth disease. 10  hand-foot-and-mouth disease.