If you are struggling with nasal congestion, you can try some of these remedies, too. Gentle blowing of the nose, just clearing the front of the nose, seems to work better. These work by increasing blood flow by widening the blood vessels, but are effective in only 50 per cent of men. The Gold Standard -- Don't Leave Hand Washing Behind While some of the above tips may be particularly fun ways to ward off illness this flu season, doctors emphasize that these methods should only complement the standard flu-fighting efforts of vaccination, hand washing and dodging contamination. There are no drug treatments for FSD, though 25 are in development. This affects 14 per cent of men in northern Europe and can be caused by underlying medical conditions such as high blood pressure, diabetes, smoking, high cholesterol, prostate surgery, or a psychological cause such as depression. Frequent Romps and a Good Rub Down Rev Immunity Another well-known stress buster, sex has also been shown to have immune-boosting effects when had regularly. Up to 43 per cent of women are said to suffer from FSD, including low sex drive and inability to orgasm. Students who said they had sex less than once a week registered a small increase of IgA over those who abstained completely Students who said they had sex once or twice a week registered a percent increase of IgA Students who said they had sex more than three times a week registered lower IgA levels than those who abstained This means that having regular sex once a week can raise your IgA levels, but everything should be kept in moderation. After studying sexual activity the professors, who will present their findings next April, now hope to analyse how love can affect the immune system. Professor Peter Weisberg, medical director of the British Heart Foundation, says there is no evidence that men who have sex regularly in their 40s, 50s and beyond are at an increased risk of heart attack. Repeated episodes of erectile dysfunction ED are a key indicator of undiagnosed early cardiovascular disease, warns Dr Graham Jackson.