Swine Flu: The deadly history of the H1N1 virus in Scotland
The virus was first identified in Mexico and has led to the deaths of hundreds across the UK.
Two new cases of Swine flu have been discovered in Lanarkshire.
The patients are being treated for the H1N1 bug at Wishaw General Hospital, and NHS chiefs say the virus is "the main flu virus circulating" this winter.
Swine flu was first identified in Mexico in 2009, and two Scots holidaymakers were among the first to be diagnosed with the potentially deadly bug weeks later.
As the pandemic took hold in the winter of 2009 to 2010, dozens of Scots died from swine flu.