Children who are not vaccinated by 2 years of age can be vaccinated at later visits. For others at risk, the hepatitis A vaccine series may be started whenever a person wishes to be protected or is at risk of infection.For travelers, it is best to start the vaccine series at least one month before traveling.(Some protection may still result if the vaccine is given on or closer to the travel date.).epatitis A is a serious liver disease caused by the hepatitis A virus (HAV). HAV is found in the stool of people with hepatitis A. It is usually spread by close personal contact and sometimes by eating food or drinking water containing HAV.
Poaching, overgrazing and clearing of the land for crops are the main threats. About 16 percent of tropical grasslands have been converted for agriculture or urban development. Desertification is also a significant threat.nimals. Tropical grassland animals (which do not all occur in the same area) include giraffes, zebras, buffaloes, kangaroos, mice, moles, gophers, ground squirrels, snakes, worms, termites, beetles, lions, leopards, hyenas, and elephants.
Grassland Adapted Animals-The Animals that live in Grasslands have adapted themselves to dry, windy conditions. Most of the Animals found in Grasslands are grazers which eat a variety of Grasses and other Plants.atural Grasslands primarily occur in regions that receive between 500 and 900 mm (20 and 35 in) of rain per year. Grasslands can exist naturally in areas with higher rainfall when other factors prevent the growth of Forests, such as in serpentine barrens, where minerals in the soil inhibit most Plants from growing.