- If you maintain a good relationship with your spouse (10 hearts), already have the nursery, and have been married for at least 7 days, there is a ~5% chance that they will ask if you want to have children. If you agree, the baby will be born after 14 days and appears in the crib in the nursery. For the first 14 days in the nursery, the baby will stay sleeping. After this, it will begin to stand in the crib (except when sleeping) for another 14 days, but you can play with it. When this stage is passed, it will be allowed out of its crib for another 14 days to crawl around in your house during the day. Finally, the baby will enter the toddler stage for the rest of its life. It will start sleeping in one of the beds in the nursery, freeing the crib for another child (if you do not already have two children).
a) Agent : The causative agents is the polioviruses which have three serotypes 1,2 and 3. Most outbreaks of paralytic polio are due to tpye-1 virus. Polio virus can survive for long periods in the external environment. In a cold environment, it can live in water for 4 months and in faeces for 6 months. It is therefore well-adapted for the faecal-oral route of transmission.
Although the live virus vaccine was highly effective at protecting against polio, a few cases of polio per year were caused by the oral vaccine itself. In 2000, the U.S. switched to the inactivated polio vaccine (IPV).ost people should get the polio vaccine when they are children. Children should be vaccinated with four doses of IPV at the following ages: 1  A dose at 2 months. 2  A dose at 4 months.