Pandemic experts explain a second wave does not necessarily entail any change in the composition of the virus.

VOA: standard.2009.09.04

An estimated 30,000 people marched through Athens Thursday in a second wave of protests against civil service pay cuts and a freeze on pensions worth $6.5 billion.

VOA: standard.2010.03.11

Senior Red Cross Officer for Health in Emergencies,Tammam Aloudat, says countries in the Northern hemisphere have gone through the first wave of the Swine flu pandemic and now have to prepare for a second wave of the virus.

VOA: standard.2009.09.04