What are CTE and concussion and how do they affect athletes?

What’s the difference between CTE and concussion? What are their short-term and long-term effects? And how are sporting codes handling the problem?

source https://www.smh.com.au/sport/what-are-cte-and-concussion-and-how-do-they-affect-athletes-20200310-p548p1.html?ref=rss&utm_medium=rss&utm_source=rss_feed