Currently there are two polio vaccines that are in use throughout the world to fight against polio. Jonas Salk, the man who invented the first, started his work on a vaccine in 1955. The vaccine worked in two steps: first a dose of killed polio virus is injected, and then an oral polio vaccine must be taken which contains a live but much weakened form of the virus. This vaccine was first tested in 1957 on humans, and was later liscensed in 1962.
It's Never too Late to Choose a New Career - Go for Best Opportunity that Comes Your Way
Middle age does strange things to every person. It eventually makes a person evaluate priorities in life. Not all but few people succeed in giving themselves a good career. You can end up working in a good company, and sometimes even though after wor..6 Ways of Making your Employees Feel Appreciated
Appreciation is something that everyone anticipates and likes. If you do something good for a person or work with an organization with contributing creative ideas and good performance, simple appreciative words will make them feel satisfied and motiv..Know What is an Angel Investor
One of the hardest things to get, when you are looking to start a business is to get the finance required for it. However, here comes the angel investor, to help you and pull you out of your financial problems. Angel investors are one of the best cho..