Pedestrians, cyclicts (motor or bike), horse-drawn vehicles, and wheelchair users are known as the most vulnerable road users.
These road users require extra care by drivers because they are individuals who most likely will be caught in an accident.
Pedestrians, especially children and elderly, may unwittingly put themselves into harm by stepping on the road with oncoming vehicles.
Drivers must be aware of this possibility and must drive carefully and responsibly.
Maintain a weight below the normal range.
Answer: the antigens identify the foreign invader
