Sudden emergence of cases, and uncertainties around how and where individuals contracted virus, has left scientists puzzled, with sexual contact seen as likely route of transmission
More than three million people in the UK have lung conditions such as asthma or chronic obstructive pulmonary disease and are vulnerable to attacks when pollen counts are high
Psychologists often see pornography along a spectrum, with some viewing it as being relatively harmless or even helpful. But too much use, for the wrong reasons and in inappropriate locations can result in harmful distortions to our perceptions and values, writes Craig Jackson