Since then it has spread to neighboring countries including Kenya,Rwanda,Tanzania and the Democratic Republic of Congo.

VOA: special.2009.09.21

If the immune system weakens at any point, they begin to spread and then attack.

VOA: special.2009.03.25

Since then, the disease has spread to more than one hundred countries.

VOA: special.2009.05.26

Since then the idea has spread internationally.

VOA: special.2009.12.28

They are not working in a coordinated fashion, but certainly they have got the message that if they don't do something soon, then the turmoil that we are seeing in Greece could easily spread to other countries and that it will be harder to turn around."

VOA: standard.2010.05.25