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:
Early Retirement. You can start your Social Security benefits as early as age 62, but your benefit amount will be less than your full retirement benefit. If you take early retirement, your benefits will be reduced based on the number of months you will receive checks before you reach full retirement age. If your full retirement age is 65, the reduction for starting your Social Security is about 20% at age 6-2; 13-1/3% at age 63, and about 6 2/3% at age 64.