contagious

英 [kənˈteɪdʒəs]

美 [kənˈteɪdʒəs]

adj. (疾病)接触传染的; 患接触性传染病

Collins.1 / BNC.15314 / COCA.11527

牛津词典

adj.

（疾病）接触传染的
a contagious disease spreads by people touching each other
1. Scarlet fever is highly contagious.
  猩红热的接触传染性很强。
2. His enthusiasm was contagious (= spread quickly to other people) .
  他的热情富有感染力。
3. a contagious laugh
  有感染力的笑声
患接触性传染病
if a person is contagious , they have a disease that can be spread to other people by touch

ADJ-GRADED （病）接触传染的
A disease that iscontagiouscan be caught by touching people or things that are infected with it.
1. ...a highly contagious disease of the lungs.
  极具传染性的肺病
ADJ-GRADED (感情、态度等)感染性的，会迅速蔓延开的
A feeling or attitude that iscontagiousspreads quickly among a group of people.
1. Laughing is contagious...
  笑是有感染力的。
2. Antonio has a contagious enthusiasm for the beautiful aspect of food.
  安东尼奥对食品赏心悦目这一方面的热情非常有感染性。

adj

(of disease) capable of being transmitted by infection
Synonym:catchingcommunicablecontractabletransmissibletransmittable
easily diffused or spread as from one person to another
1. a contagious grin

So I think in the song only into sincere feelings, and vitality will be contagious!
所以我认为在歌声中只有融入真挚的感情，才会有感染力和生命力！
We have made this mess, and mistakes today are highly contagious.
我们造成了混乱，而今天的错误具有高度传染性。
The virus remains active and contagious in the air or on infected surfaces for up to two hours.
麻疹病毒在空气中或受感染物体表面2小时内可保持活力和传染性。
It's destructive and it's contagious.
它具毁灭性，也有传染性。
This disease is not contagious [ infectious].
这病不传染。
People with contagious diseases should be isolated.
传染病患者应予以隔离。
Measles is a highly contagious, serious disease caused by a virus.
麻疹是病毒引起的传染性极强的严重疾病。
There are still some unfounded fears floating around out there about cancer being contagious.
社会上还是有一些毫无根据的关于癌症会传染的恐惧。
He got a certain contagious disease at the end of year.
年底时他得了一种传染病。
Hepatitis B is caused by a highly contagious virus that infects the liver.
乙肝是由一种高度传染性的嗜肝细胞病毒感染所致。