This is the 566th most frequent Vietnamese word.
vaccine
A substance used to stimulate the immune system to provide immunity against a specific disease.
In this sentence, 'vaccine' refers to a medical substance administered to generate immunity against influenza.
Tôi đã tiêm vaccine phòng chống cúm.
I have received the flu prevention vaccine.
Here, 'vaccine' signifies a medical innovation being researched and created.
Nghiên cứu khoa học đang phát triển loại vaccine mới.
Scientific research is developing a new vaccine.
In this context, 'vaccine' is mentioned as part of the broader practice of vaccination for public health.