What is swine flu?Swine flu is a type of flu (influenza). It usually affects pigs but it can also affect humans. The virus can be transmitted from human-to-human. Before spring 2009, the virus rarely passed from human-to-human.
A new strain of the swine influenza virus called influenza H1N1v emerged in Mexico in spring 2009. This new strain spread easily from human-to-human and began to spread, affecting people in many countries, including the UK. When a strain of influenza spreads easily between humans and causes many cases in several countries, this is called a pandemic. In the winter of 2009/10 it reached a pandemic stage when many people were affected all over the world. Early in 2010 the number of new cases began to fall and in August the World Health Organisation announced that we are in post pandemic stages.
The virus is now one of the seasonal flu viruses that circulate each winter and is no more dangerous than normal flu. Most people have some level of immunity to the virus and it's much less of a concern than in 2009-10.
Seeing as Swine flu is now considered part of the normal flu virus, the symptoms are pretty much those that you're already familiar with such as a fever and aching muscles.
Here's a full list of flu symptoms: