The difference between post-epidemic situation and epidemic situation

COVID-19, also known as "Coronavirus Pneumonia-19" internationally, is raging all over the world. So two terms often appear, one is "post-epidemic world" and the other is "post-epidemic world".

What do these two words mean respectively? "Post-epidemic" means that the epidemic has not stopped and continues to exist and become the norm; After this epidemic, the second and third waves may appear again, facing a "protracted war." "After the epidemic" means that the epidemic is under control. After a "storm", the dark clouds are no longer covered and the weather is fine.

After human body is infected with pathogens, whether it is symptomatic dominant infection or asymptomatic recessive infection, it can produce specific immunity against pathogens and their products (such as toxins), which is called post-infection immunity.

The duration of immunity after infection varies with infectious diseases. Generally speaking, immunity to viral infectious diseases (such as measles, polio, Japanese encephalitis, etc.). ) stable and lasting after infection, even lifelong immunity. COVID-19 is a viral infectious disease. According to the general rule, the immunity after infection will last for a long time, at least for half a year, and it may be longer. However, there are always exceptions, and it remains to be seen how.