They're the most common cause of stomach bugs (gastroenteritis) in the UK. Each year, it's estimated that between 600,000 and 1 million people in the UK catch norovirus. The illness is sometimes called the winter vomiting bug because it's more common in winter. However, you can catch the virus at any time of the year.hey're the most common cause of stomach bugs (gastroenteritis) in the UK. Each year, it's estimated that between 600,000 and 1 million people in the UK catch norovirus. The illness is sometimes called the winter vomiting bug because it's more common in winter. However, you can catch the virus at any time of the year.
On the contrary, individuals who are carriers for the sickle cell disease (with one sickle gene and one normal hemoglobin gene, also known as sickle cell trait) have some protective advantage against malaria.
Types of Skin Cells. However, your skin isn't a weakling, and does have a defense mechanism that tries to fight off dangerous ultraviolet rays found in sunlight. In the deepest layer of the epidermis, the stratum basale, which is also sometimes called the basal layer, are cells called melanocytes.These are cells that produce the pigment melanin. It is this substance, melanin, which determines the skin color of an individual.n addition to housing young keratinocytes and melanocytes, the basal layer of your skin also contains other cells, such as Merkel cells, which are cells that are important in the sensation of touch. With all of that in mind, I do have an important point to make.