One of the people who is involve in this says:
We just rolled over 10,000 verified killed and injured people for the year, this evening. That is a lot of mothers and daughters and aunts and sisters who will have a less than pleasant Mothers' Day this year.You might want to check out their methodology and about us pages before writing comments.
Total incidents includes all gun violence, not just where injuries/ death occur. Things like armed robbery, home invasions, defensive use, hostage incidents with guns that end without holes.
Also, many single incidents have multiple injuries/ deaths. Any attempt to map incident numbers to death/ injury numbers would not ever be possible in a summary..
Better to keep your mouth closed and have people think you are an idiot than open it and confirm their opinion.