This is the 2883rd most frequent Chinese word.
无症状
"Asymptomatic"
In this sentence, 無症狀 (wú zhèng zhuàng) is used as an adjective to describe the state of being without symptoms regarding infection.
许多人感染新冠病毒时是无症状的。
Many people are asymptomatic when infected with the COVID-19 virus.
Here, 無症狀 (wú zhèng zhuàng) is used as an attributive modifier to describe the type of transmission.
无症状传播使疫情控制更加困难。
The asymptomatic transmission makes controlling the pandemic more challenging.
In this sentence, 無症狀 (wú zhèng zhuàng) is used to describe patients who do not show symptoms as a modifier for the noun 患者 (patients).