After being “Yang Kang”, how long will it take for the person to remain non-contagious?

As more and more people are

Netizens have new questions:

If there are no symptoms, does that mean we are not contagious?

I heard it takes 15 days to produce antibodies.

Can I have peace of mind from now on?

To this

Li Dong, chief physician of the Department of Infectious Diseases, Beijing You'an Hospital

We have provided interpretations to netizens’ concerns!

How to judge whether you are really "yin"

According to the ninth edition of the diagnosis and treatment plan

First, the symptoms need to improve

For example, the body temperature is normal for more than three days

Respiratory symptoms have disappeared or have been significantly relieved

If you have pneumonia

The CT scan showed that the lesions in the lungs were beginning to absorb and improve.

In addition, two nucleic acid tests were negative

The interval between these two times should be more than 24 hours

Or the CT value of nucleic acid is greater than or equal to 35

This way it meets the conditions for turning negative.

Li Dong once said

If the above conditions are met

The infectiousness is already very low.

No symptoms, but still contagious

Some netizens said

After being infected with the new coronavirus

No symptoms for five days.

Is it no longer contagious?

Li Dongzeng suggested

It is best to isolate for seven days

The vast majority of people turn negative in about seven days.

You may still be contagious on the fifth day.

At the same time, many netizens said

Although the symptoms have turned negative,

For example, cough

Li Dong once said

If you still have coughing symptoms after turning negative

Wear a mask after returning to work

Some special occupations

For example, staff in nursing homes and intensive care units

Or when planning to visit the elderly, infants and young children

It is safer to isolate for ten days

He introduced

Coughing is a process of recovery

Will naturally metabolize dead immune cells

Cells destroyed by the virus are excreted from the body

It cleans up the "battlefield" and repairs the airway

Time is long or short

But almost all of them can be completely cured within fourteen days

Less susceptible to infection within two weeks

Regarding online opinions

“It takes about two weeks after a positive result to produce antibodies.”

“The most likely time for a second infection is about a week after recovery.”

Li Dong once said

The above statement is inaccurate

When the virus enters the body

The immune system has already started working

Subsequent production of protective antibodies

It will reach a peak in two to three weeks.

In these two weeks

If the virus enters the body again, it will be cleared quickly.

On the contrary, it is relatively less likely to be infected

Therefore, people are immune to the virus after infection.

You can go and take care of other positive family members without any worries.

Regarding the question raised by some netizens

After "Yang Kang", I still feel chest tightness, shortness of breath and weakness

Li Dong once said

These symptoms usually resolve within two weeks.

For young people with normal immune function

Most people can basically recover to their pre-illness state within two weeks.

Also remind

Don't just recover.

I immediately started doing very heavy work.

Or go for vigorous exercise or fitness right away

Still need to proceed step by step

Once you find these problems such as fatigue and sweating

Just take a rest

Don't be too happy, the virus is still mutating

Regarding online opinions

“Having been infected with the new coronavirus once is equivalent to having been vaccinated with the new coronavirus vaccine once”

Li Dong once said

Infection cannot replace vaccine

He said that after being infected with a virus strain,

Will produce high levels of antibodies against this strain

The protection may last for more than half a year

The strains BA.5.2 and BF.7 currently prevalent in my country

Viruses belonging to the same branch

Infection with one of the **** or similar strains

Cross protection

No infection in the short term

But he also pointed out that in general

The longer we are infected,

The lower the antibody level in the body

The greater the risk of infection

at the same time

If the virus continues to mutate

Or some distantly related strains

The risk of infection also increases

also

There are other respiratory infectious diseases in winter and spring

Such as influenza, adenovirus, respiratory syncytial virus, etc.

Take more precautions

Booster shots after recovery

Li Dongzeng suggested

Continue to maintain good hygiene habits

Wear a mask and wash your hands frequently

Open windows for ventilation

Maintain social distance

Pay attention to coughing etiquette, etc.

After recovery, the protection generally lasts for 3 to 6 months.

Therefore, young people can

Get another booster shot

The elderly have shorter protective abilities.

You can get a booster shot after 3 months.

Facing the epidemic

Don't be too nervous or too relaxed

Scientific protection

To protect yourself and those around you

Source: CCTV.com (ID: cctvcomweixin), CCTV News