A study by an American scientific research institution found that men who have sex 1-2 times a week have stronger immunity than those who have sex less often. Saliva tests have found that having sex twice a week increases a person's antibody immunoglobulin A (the body's defense line against colds) by 30%.

The key to beating a cold is prevention. The latest article published by the American "Rodale" health consulting website has summarized several interesting tips for preventing colds. You might as well give it a try.

1. Sing in the bath

The nasal cavity tends to dry out in autumn and winter, so keeping it moist will help prevent viruses from taking advantage of it. Steam is a natural decongestant that softens nasal mucus and opens up the nasal passages. When taking a bath, you might as well sing a song to help enhance deep breathing and make the steam penetrate deeper into the nasal cavity more easily.

2. Drink some beer

Drinking beer in moderation can help prevent colds. Studies have found that people who drink four glasses of wine a day are less likely to catch colds than those who don't drink alcohol. This is because alcohol can exert an anti-inflammatory effect, inhibit the reproduction of viruses, and thereby inhibit the production of nasal mucus.

3. Have sex twice a week

A study at Wilkes University in Pennsylvania, USA, found that people who have sex once or twice a week have stronger immune systems than those who have less sex. Saliva tests have found that having sex twice a week increases a person's antibody immunoglobulin A (the body's defense line against colds) by 30%.

4. Learn how bees breathe

Studies have found that buzzing can open the openings connecting the sinuses and nasal cavities, making breathing easier and helping to drain nasal mucus. Sit in a comfortable position and inhale deeply through your nose, making a buzzing sound as you exhale. You can feel vibrations in your nose, chest, and brain. Buzzing can prolong exhalation and is also useful for relieving anxiety.

5. Take a walk with friends

David Nieman, a professor of health and exercise science at Appalachian State University in the United States, said that regular exercise can stimulate the vitality of immune cells and enhance the ability to fight colds. Research has found that adults who walk five times a week for 45 minutes each time are half as likely to catch a cold than those who don't like walking. In addition, friendship is a "cold virus killer". A study published in the "Journal of the American Medical Association" stated that walking with friends can help reduce the risk of colds.

6. Get out of the house

The reason why people are more likely to catch colds in winter is mostly because people stay indoors for too long and have too many close contacts with cold patients. Walking outside more often and opening windows for ventilation can help reduce the risk of catching a cold.

7. Practice Tai Chi

Taichi can increase the body's disease resistance by 47%, and can even triple the protective effect of the flu vaccine. Scientists say the key is Tai Chi's slow movements and controlled breathing, both of which kill germs. Practicing Tai Chi can also relieve stress and improve sleep.

8. Eat more spicy soy products

Eating spicy soy products in winter can not only help warm the body, but also prevent the flu. Nutritionists from Wake Forest University in the United States said that peppers can enhance immunity, hot sauce can also clear the nose, and onions and garlic also contain phytochemicals that can enhance the immune system. Soy isoflavones in tofu and soybeans also have immune-boosting effects.