 
 <prompt> ```Why doctors dey suggest make people collect flu vaccine every year?

Available choices:
1). Viruses dey replicate quick quick as time dey go by.;
2). Viruses fit change from year to year.;
3). Vaccines dey enter body after one year pass.;
4). Vaccines dey become stronger as time dey go by.;``` <response>: ```2).```
Translate the text above to Nigerian pidgin. If there is programming code in it, leave as is. Do not add any extra statement in your response: 