Several human diseases caused by protozoa are transmitted by a variety of arthropod vectors (Table). The vectors are not simply 'flying syringes', but represent a second host for the protozoan parasite.arasites which reside within the blood or internal organs of the host have logistical problems in terms of infecting a new host. In contrast to fecal-oral transmission, where infective stages are excreted into the environment, potential new hosts would not normally come into contact with the parasite.
If you have accumulated enough work credits (typically 40) the earliest you can collect Social Security retirement benefits is 62. At that age, your monthly payment would be about 75% of the amount you would receive by waiting to retire at SSA's full retirement age. Full retirement age:
Social security continues to a primary source of income for millions of senior citizens and other people who are incapable of working. While the program does provide a form of income for millions of people, there are some requirements which must be met in order to receive the benefits. A primary requirement for most people to qualify for social security benefits is to meet the age requirement to start taking benefits. Those who are receiving the benefit due to their age will receive it when they turn 62 years of age. However, if they take the benefit before they turn 67 years of age, they will only receive a partial benefit. The benefit will then increase by a small cost of living increase every year after the benefit is taken.