本期医学相关词汇：
Germs (微生物，细菌)
immune (免疫的) system
bronchitis (支气管炎)
a sinus (鼻窦) infection (感染)
complications (并发症)
respiratory (呼吸的) illnesses
antibacterial(抗菌的) soap
fending off (fend off避开) colds
infectious (有传染性的) diseases
sanitizer (消毒杀菌剂)
modes of transmission [传播，传输]
be contaminated (污染) with viruses
chronic (慢性的) medical problems
asthma 哮喘,
diabetes 糖尿病
nasal spray vaccine (鼻部喷雾疫苗)
sneezing (喷嚏)
blow his nose
mucous membranes (粘膜)
tonsils 扁桃腺
inhale (吸入)
symptoms (症状)
placebo (安慰剂)
pasteurize (用巴氏法灭菌)
susceptibility (易感性) to colds
a zinc (锌) lozenge (止咳糖)
capsule (胶囊)
a full-blown (全面的) cold (重感冒)
sinuses (鼻窦)
nostril (鼻孔)
antibiotics (抗生素)
viruses (病毒)
bacteria (细菌)