The attenuated polio vaccine has already worked this way for more than 70 years. People can catch the vaccine like how they can catch the virus. This has had po

The attenuated polio vaccine has already worked this way for more than 70 years. People can catch the vaccine like how they can catch the virus. This has had positive effects on boosting immunity in developing countries where the parents may be unable to take their children to be vaccinated, due to work commitments, expenses of travelling to the nearest clinic, etc.