(I was also yang, and it took seven days to become yin.)
Will emotions affect the body's immune function?

Of course! And the impact is very big! Let me tell you a story to explain how this effect occurs.
We imagine ourselves as a kingdom. In such a kingdom, there is a king, a general and a princess.

The "King" is our brain, which is responsible for decision-making, such as when to sleep, what time to get up, what to eat, what to drink, what kind of lifestyle to choose, and what kind of state to live in... These are all decided by the King.
"General" is the natural wisdom within our bodies. It is also our subconscious mind, which controls the natural operation of the body, such as blood circulation , bile and gastric juice secretion, cell metabolism, etc... Of course, it also controls the immune function of our body. These cannot be controlled by the brain, they can only be controlled by the subconscious mind, that is, by the "general".
"Princess" is our emotions and moods, such as anxiety and panic.
got new crown , everyone's emotional reaction is different, some people are very calm, some people will be anxious and panic.
The new coronavirus is the enemy of the kingdom. Who is responsible for killing the enemy?
Of course, the general leads the immune troops to accomplish this. However, once the princess becomes anxious or panicked and the princess is not calm, the king will take action randomly.
The princess is the heart, and the king is our brain. What will we do when our heart and brain are afraid? --confrontation! Refuse to accept...

So - when we have a fever, our consciousness refuses to accept the fever; for pain, our consciousness refuses to accept the pain; when we can't sleep, our consciousness refuses to accept the inability to sleep...
In short, it is easy for us to refuse to accept being sick and refuse to accept all discomforts!
However, rejection and confrontation will not make all this disappear, but will make us more painful, uncomfortable, and unable to sleep even more!
why? The virus is here. The body feels uncomfortable and the brain is very nervous. It wants to control the situation, but it has no ability to lead the immune function to win the battle.
At this time, if our consciousness can - "allow everything to be as it is (mindfulness)", that is to say - the king is willing to let go and hand over the problem to the "general" who has mastered natural wisdom to solve it. The king delegates power and fully relaxes... Give full trust to the generals and the body's immune forces, and at the same time direct yourself to do what you can, such as resting more, drinking more hot water, and supporting the immune system . This is the wisest choice.
However, if the brain is a fool (a self-limiting way of thinking), it is panicked, it does not trust the generals, and it does not trust the innate natural wisdom that the universe has given to the human body. It is very nervous, and it insists on controlling and fighting problems, causing our bodies and minds to be tense and restricted, with blocked meridians, poor qi and blood, and suppressed functions... Then, the process of the general leading the immune troops to fight against the virus will inevitably be greatly affected, and the immune function will also be greatly restricted. This leads to increased pain, prolonged and repeated disease course... physical deterioration, and even multi-system problems.
For the new coronavirus, appropriate vigilance and prevention are necessary. The brain can guide us to protect ourselves, keep warm, get more rest, eat healthily, drink more hot water...
However, there are always limits to the problems that the brain can solve alone in life!
If you are really sick, infected with COVID-19, and your brain is helpless and cannot do more, you need to delegate power and allow everything to be as it is...
In this way, the pattern of the mind can be enlarged to accommodate the existence of problems. Then, only then can there be a chance to activate the wisdom of the subconscious, and use mindfulness to resolve problems in a natural way.