疫苗 (yì miáo): vaccine

To prevent the flu, many elderly people go to the hospital every autumn to get vaccinated.

Scientists are working hard to develop a new COVID-19 vaccine that can tackle all variants.

After vaccination, some people may experience mild fever or a sore arm, but these reactions usually disappear in a day or two.

Worried about side effects, he hesitated for a long time, but in the end still decided to go get the vaccine.

This vaccine needs to be stored at extremely low temperatures, and special refrigeration equipment must be used during transportation.

The World Health Organization calls on countries to distribute vaccines fairly to ensure that impoverished areas can also receive protection.