What medical advancement helped control infectious diseases in the 1950s?
Inoculation of children at school (public health programmes) which included the polio vaccines and tetanus.
What advances were being made in medicine in the 1950s?
1 Polio vaccine 2. Electron Scanning Microscopes 3. Heart/Lung machine 4. 1st link to tobacco &heart disease established 5. discovery of DNA 6. establishment of the national center for disease control in Atlanta 7. 1st use of flouride in drinking water
Harmful Effects of genetic engineering? Human designing !?
Can you think or list some Harmful Effects of genetic Harmful Effects of genetic engineering, if possible ... please list web-sites (links), books names... and i would aprciate the best as possible ... thanks in advance
Why can't third world countries develop?
This is a very deep and broad question. It's the sort of thing many scholars have written many books and dissertations about. I will very briefly talk about two of the important aspects: governance and demographics. Most less developed countries have been kicked around by bigger countries in the past. This is especially true of former colonies that were robbed of their resources by imperial powers, and then abandoned. Situations like this give rise to political instability and massive corruption, and in a climate like that, progress is very difficult. Money that could be used for development is instead funnelled into the military and into the pockets of high ranking officials. Leaders in these situations are more concerned with keeping their power than about helping the people of their country.Second is the fact that these country can't keep up with population growth. In a completely undeveloped society with no technology whatsoever, death rates are very high; many infants die shortly after birth, and people generally die young from diseases, infections, accidents, etc. There is also a high birth rate because there are no contraceptives, and all the dying people have to be replaced. High births and high deaths means the population stays level.Once development begins, people die less. Medical advances allow lives to be saved, yet birth rates remain high. High births and lower deaths means that the population starts to grow. This is the trap that the developing world finds itself in. They are gaining people rapidly, yet they don't have money to accommodate them.In order to give people a place to live, there have to be plumbing lines, electric lines, roads, etc. just so that a house or apartment building can be built. Developing countries can't afford to build all of these things, so there aren't enough nice homes for everyone to live in. There are also not enough jobs for everyone. This worsens poverty, and promotes illegal activity. Also, gaining more people puts more strain on public services, so not everyone can get help from the government.The developing world is truly in a quagmire.