Great news today: "us pharmaceutical giant Pfizer and German biotech firm BioNTech have announced that their coronavirus vaccine is more than 90% effective in preventing Covid-19 among those who have no evidence of previous infection."
I was scrolling through mostly all the responses regarding this news and i would like to introduce the company Pfizer, Viagra is created by Pfizer which is now commonly used to treat erectile dysfunction and they developed the drug initially for heart patients and i would say they need to change that pitch and made some changes and made a medicine for erectile dysfunction 
.So what i am trying to tell is that i am skeptical until they are able to prove conclusively that the vaccine they are developing is conclusive and is able to eradicate the virus, until then i am not going to believe what they are claiming.
The economic incentives is another topic altogether and for the entire world to go back to normal we need a vaccine and there is no denying that.