How to avoid/prevent Aborted Connections in mysql
All aborted connections tells you is the number of aborted connections.  It doesn't tell you why they didn't connect.

Do you have some kind of monitoring system or network scanning system in place?  e.g. Nagios, Spiceworks?  They will/can make a connection to the database network socket, then either not authenticate or fail to authenticate because they haven't been configured correctly.

These would cause the value of aborted connections to rise every time they attempt a connection, which could be very frequently.