What is the probability of infection in close contact? How many days can close contact be detected?

1 The infection probability of close contacts is uncertain.

Close contacts refer to those who have had close contact with suspected cases and confirmed cases in COVID-19 two days before symptoms appear, and those who have not taken effective protective measures two days before the collection of asymptomatic infected persons.

Relatively speaking, the probability of close contact is still relatively high, but it still needs to be determined according to the time of contact with patients, the size of contact area and personal physique. Generally, close contacts will be required to conduct centralized isolation observation.

Secret users can be detected in a few days, usually about 7- 14 days.

COVID-19 has a certain incubation period, but it can't be detected during the incubation period. Generally speaking, it is about 7- 14 days, but the specific incubation period is also related to personal physique and virus infection. Some incubation periods are only 3 days, and some are 2 1 day.

Generally speaking, close contacts need to carry out nucleic acid testing on the first 1, the seventh, and the 14 days during the period of centralized isolation, and all the results are negative before the isolation can be lifted.

It is contagious a few days after close contact, usually 48 hours before the symptoms appear in the case.

Generally speaking, 48 hours after close contact with the patient, it begins to be contagious before symptoms appear. However, because everyone's physique is different, the time for symptoms to appear is different, so different people have different infectious times.

In most cases, the corresponding symptoms, such as dizziness, fatigue, fever, cough and so on. , will appear 3-7 days after contact with the case, so it seems to be contagious from the first day of close contact.

Is it safe after an incubation period of 4 14 days? Yes, for most people.

Because the incubation period of COVID-19 is usually around 7- 14 days, it is relatively safe for most people to spend the incubation period of 14 days. At this time, medical isolation observation can be lifted.

However, the incubation period of some people can be as long as 2 1 day. Therefore, it is suggested that after the incubation period of 14 days, it is still necessary to observe at home for 7 days, and then resume daily activities after the incubation period of 2 1 day when there are no corresponding symptoms.