The type of immunity that uses both helper and killer cells is Cellular Immunity. It is used by Cellular immunity to classify the abnormal cells. Once abnormal cells are detected it is destroyed by Cellular Immunity. Cellular Immunity serve as resistance from diseases caused by viruses.
I believe <span>athletes and sports competitor had a very low level job security.
Their job security is low due to the high chance of getting an injury which could affect their performance in the future, which may cause them to lose their job.
Even if they're managed to spend their career without any injury, their career will peak when enter the age of 31-35.</span>
