'We are deeply saddened and shocked at the passing of our dear friend and colleague,' UnitedHealth said in a statement.

Many health experts say the games should go forward and insurance probably wouldn't cover postponement.

Zika could cost Latin America and the Caribbean $3.5 billion in 2016 through lost travel and tourism, as well as economic and medical costs of the illness, according to an initial estimate the World Bank.

Drug overdoses are eclipsing car crashes as a leading cause of accidental death for American adults.

Any tool that can help accurately identify when a concussion has occurred would be a welcome advance for NFL players as well as young athletes.