I can't believe in this day an age they would be using a live virus in any shot or vaccine. - Tom
The oral vaccine has two advantages over the injection one
1. It is way cheaper.
2. It does not need to be refrigerated.
The oral vaccine is perfect for countries without electricity or infrastructure. You can immunize millions of people with the oral vaccine for the cost of only immunizing a few hundred thousand
The problem now is that they gave immunized everyone in Africa so the few deaths that occurred from the oral vaccine are now more than the wild strain, so it looks bad.