The pathogens of polio are polioviruses, which are part of the enterovirus genus. There are three serotypes of poliovirus: type 1, type 2, and type 3. These viruses are transmitted through the fecal-oral route, typically entering the body through contaminated food or water. Once inside the body, the virus multiplies in the intestines and can then spread to the nervous system, leading to symptoms of polio. **

Polio is caused by the poliovirus, which is a highly contagious virus that primarily spreads through person-to-person contact. There are three strains of the poliovirus, known as type 1, type 2, and type 3. The virus enters the body through the mouth and multiplies in the intestines, leading to potential infection of the nervous system and paralysis. Vaccination has been highly effective in reducing the incidence of polio worldwide. **

The amount a supermarket earns from groceries can vary widely depending on factors such as the size of the store, location, and customer base. On average, supermarkets typically earn a profit margin of around 1-3% on grocery sales. This means that for every dollar of groceries sold, the supermarket makes a profit of 1-3 cents. However, this can fluctuate based on various factors such as competition, pricing strategies, and operational costs. **

The cheapest discount supermarket for groceries can vary depending on location and specific items. However, some of the well-known discount supermarkets that are generally considered to offer low prices include Aldi, Lidl, and Walmart. These supermarkets are known for their competitive pricing and focus on offering affordable groceries to their customers. It's always a good idea to compare prices and promotions at different discount supermarkets to find the best deals for your specific grocery needs. **

No, the organic eggs from the supermarket are not fertilized. Organic eggs come from hens that are raised in organic, free-range environments and are not in contact with roosters. Therefore, the eggs laid by these hens are not fertilized and will not develop into chicks. The hens lay eggs regardless of whether they have been in contact with a rooster, so the eggs sold in supermarkets are not fertilized. **

The decrease in new polio cases in East Germany in 1960 and in West Germany in 1962 can be attributed to the introduction of the polio vaccine. The vaccine, developed by Jonas Salk, became widely available in the late 1950s and early 1960s, leading to a significant reduction in polio cases. Mass vaccination campaigns and the widespread adoption of the vaccine played a crucial role in controlling the spread of the disease and ultimately led to a decline in new polio cases in both East and West Germany. **

In Germany and other European countries, polio has been very rare for over 30 years due to the successful implementation of widespread vaccination programs. These countries have high vaccination coverage rates, which have effectively prevented the spread of the poliovirus. Additionally, improved sanitation and hygiene practices have also played a role in reducing the transmission of the virus. However, in countries where vaccination coverage is low and sanitation conditions are poor, polio outbreaks can still occur. **

The decrease in new cases of polio in East Germany in 1960 and in West Germany in 1962 can be attributed to the introduction of the polio vaccine. The widespread vaccination campaigns that were implemented in both East and West Germany helped to build immunity against the poliovirus in the population, leading to a significant reduction in new cases. The success of these vaccination efforts highlights the importance of immunization in controlling and preventing infectious diseases like polio. **