COVID-19 has spread all over the world. How much do you know about COVID-19? The so-called “Know the enemy, know yourself, and in every battle you will be victorious”. Let’s take a look at what a COVID is. This is very helpful for how to prevent COVID.
1.“Crown-Like” virus – Coronavirus
Coronavirus is a large group of viruses named for their crown-like structure under electron microscopy. They are enveloped viruses, with a diameter of about two-millionths of a grain. On the outer membrane, there are spikes distributed like a crown; and inside there is a single strand of positive-stranded RNA.
Coronavirus can infect a variety of mammals (e.g. humans, pigs, etc.) and poultry (e.g. chickens, birds, etc.). It has a strong replication ability and mutates easily since its single-stranded RNA genome lacks structural stability.
Coronavirus mainly causes respiratory infections in humans. Winter and early spring are the epidemic seasons due to the temperature preference of viral reproduction.
1.“ 王冠” 似的冠状病毒
冠状病毒是一个大型病毒家族,因该病毒形态在电镜下观察类似“王冠”而得名。它们属于有包膜病毒，直径约为小米粒的二百万分之一，外面包膜上存在的凸起使整个病毒看上去像分布在球形上的“王冠”，内部是正链单股 RNA 病毒。
2. Is COVID-19 curable?
According to current cases, most patients have a good prognosis and children have relatively mild symptoms, but there are also some patients with critical illness. Deaths are more common among the elderly and those with chronic diseases.
Just like most viral infections, COVID-19 is a self-limiting disease, conquered by the body’s own immunity. Evidence has not yet been found for the long-term survival of this virus in the human body post-recovery. However, supportive therapy is still important and should not be taken lightly. As long as the disease is reported in time, most of the patients will eventually recover after active treatment.
3. How is 2019-nCoV transmitted?
The main route of transmission is similar to SARS-CoV, via respiratory droplets produced by carriers when they cough, sneeze or talk. The droplets floating in the air might be inhaled into the lungs of people nearby, and those falling elsewhere will spread from contact.
同“哥哥” SARS 一样，经呼吸道飞沫和接触传播是主要的传播途径，也就是病毒携带者咳嗽、打喷嚏或者说话时会产生带有病毒的飞沫，漂浮在空气中会经呼吸道传播，飘落在其他地方就会通过接触传播。