Vaccines(疫苗) help keep you healthy.How do vaccines help you keep healthy?The vaccines are made from microorganism(微生物) that causes the illness.A little bit of it isn't enough to make you sick.But it is enough to make your immune system(免疫系统) active. While some vaccines last a...
(D)61.C 根据文章第一句 Vaccines help you keep healthy.可知,疫苗可以帮助我们保持 健康 62.D 根据第三段 But this vaccine won't protect you once the bacteria has changed. That's why you'll have to get a new one before the flu season hits next year.可知, 细菌变了,疫苗就不起作用了 63...
because of their age or underlying conditions. Modelling suggests that if just 10% of them declined to be vaccinated and if social distancing were abandoned while the virus was still liable to circulate
Vaccines have saved hundreds of millions of lives and helped to eradicate several diseases. Plotkin and Plotkin describe how the design of vaccines has developed from the observation that milkmaids seemed to be protected from smallpox, to a science that
Smallpox is an ancient disease caused by a virus. There's evidence that it affected the ancient Egyptians, with smallpox lesions being found on mummies. And techniques were developed in ancient China to try and stimulate the immune system, and make sure it was ready for the viral assault. ...
根据文章第一段“Vaccines (疫苗) help keep you healthy.”及“The vaccines are made from bacteria (细菌) that causes the illness.”可知,疫苗是由造成疾病的细菌制成的,可以帮助人们保持健康。故选C。 (2)题详解: 细节理解题。根据文章第三段“But this vaccine won’t protect you once (一旦) the...
C根据第一段Vaccines(疫苗) help keep you healthy.和 The vaccines aremade from microorganism(微生物) that causes the llness.可知,选C32. D根据第三段 But this vaccine won't protect you once the virus haschanged. That's why you'll have to get a new one before the fluseason hits next ...
months hadn't been vaccinated at all. The summary found this was significantly more common among children who were uninsured, Medicaid-insured or who live in rural areas – 17.2 percent of unvaccinated children were uninsured, for instance, compared with 2.8 percent of all children [source:Hill]...
"The mRNA and vector vaccines are a newer technology; the first products were developed in 1999," said Mullane. "Based on our understanding of human biology, there is no reason to believe that they should pose any greater risk than any of the more traditional types of vaccines. If anything...
Medicine has come a long way over the years. The development of thevaccinekicked off an era of illness prevention unlike anything the world had ever seen. In fact, vaccinations are largely viewed as the most successful medical advancement in the history of public health. Before vaccines were in...