It is important to identify the source of infection.

The infectious capacity of this virus is very strong.

The number of people infected with the new coronavirus is rapidly increasing.

He contracted severe invasive streptococcal disease and underwent emergency surgery.

A cranefly has come in through the window and is flying around the room.

He contracted brucellosis after returning from a trip abroad.

The use of thermonuclear weapons could potentially cause a major disaster for all of humanity.

This material has the ability to absorb the heat of the sun.

This chemical reaction is an endothermic reaction.

This machine is equipped with a high-efficiency heat removal system.