As students across the country have their yearly flu shots(打流感疫苗) doctors across the world are preparing against a possible outbreak of bird flu that few current vaccines(疫苗)will guard against. The likelihood of a bird flu spreading among humans is very high the World Health Organization ...
As students across the country have their yearly flu shots (打流感疫苗) doctors across the world are preparing against a possible outbreak of bird flu that few current vaccines (疫苗) will guard against. The likelihood of a bird flu spreading among humans is very high the World Health Organiza...