Sexually transmitted infections (STIs) are at an all-time high in the US, according to the Centres for Disease Control and Prevention.

And they differ from state to state. This map shows the rates of STIs across the country.

Each state has been rated from one to 50: the higher the score, the smaller the proportion of STIs. So on the map - the darker the colour, the smaller the rate of STIs.

Alaska has the highest combined rate of gonorrhoea and chlamydia, followed by Louisiana, North Carolina and Mississippi.

New Hampshire had the lowest rate, followed by West Virginia, Main and Vermont.