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Are you afraid of infectious diseases? But surprisingly, you can get infected and things like stress, laughter or negative thinking.

The fact that you can catch a cold, flu or even yawning is a well-known fact. But, you are likely to never thought about other things that can get infected.


# 1. Stress

A study published in the journal Social Neuroscience found that when you communicate with someone who is overcome by anxiety and stress, your own body begins to produce cortisol, a stress hormone. According to experts, to the production of cortisol in our body are subtle changes in the smell of the body of tense people. Our nose is aware of these changes, the brain identifies them as a potentially dangerous situation, and is trying to increase our vigilance precisely by increasing the production of stress hormone.


# 2. Purposes

Do you remember as a child craving the toys your friends had? This is the principle of how you can "catch" what someone else achieves. Studies have shown that people are more likely to want what someone has already achieved in their environment. This means that, for example, when one of your friends lost weight, it "infects" you, which is why you will also start trying to get rid of extra pounds.


# 3. Loneliness

This may seem strange and incomprehensible to you, but you can also get infected with a sense of loneliness and isolation. Single and isolated people tend to Express themselves more negatively and irritably. Interestingly, experts at the center for cognitive and social neurology at the University of Chicago have found that this behavior can be contagious, and so if you communicate with such people, you start at some point to behave similarly to them.


# 4. Fear

Have you ever wondered why panic and fear spread so quickly in the crowd? According to scientists, this is because of the physical smell associated with people who currently feel fear. Thus, looking at the person experiencing fear, our brain analyzes the expression of his face and also reacts with a sense of fear that keeps us alert.


# 5. Joy

Just as you can get infected with stress or fear, a person from your environment can infect you with joy and good mood. A study carried out last year showed that during the feeling of joy and happiness, the human body produces pheromones, which, in turn, reacts to the smell of other people present.


 # 6. Negative thought

Contagious are not only mood and emotions, but also trends to negative thinking. A recent study has shown that students usually take on the style of thinking of their neighbors in the Dorm room. So if you live or communicate with someone who looks at the world through black glasses, you will soon begin to think the same way.


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