Natural active immunityis adaptive immunity that develops after natural exposure to a pathogen. Examples would include the lifelong immunity that develops after recovery from a chickenpox or measles infection (although an acute infection is not always necessary to activate adaptive immunity). The length ...
Vaccines are necessary, and the risks of not being vaccinated far outweigh the small risks associated with vaccination. Preventable diseases can cause permanent disability and death. There has been no correlation between vaccines and developmental disorders such as autism. According to the American ...
根据第一段的 “The only shot I received was for tetanus (破伤风) when I was two months old. After that, nothing.(我只有两个月大的时候注射过破伤风疫苗。在那之后,什么都没有)”和第二段中 “The school doctor would tell me I hadn't received any of the necessary shots to attend school....
Late for school? None of them.I'd be pulled out of class and brought to the headmaster's office.The school doctor would tell me I hadn't received any of the necessary shots to attend school.(作业交晚了? 调皮捣蛋了?上学迟到了?都不是。我会被带出教 室,被带到校长办公室。校医会告诉...
Although the negative claims behind anti-immunization stances are deceptive and discredited, some parents find it difficult to accept that vaccines are necessary and safe. Many of these reasons are due to personal or religious beliefs that have persuaded parents to bypass immunizations for their child...
Today, the ACIP meets three times a year to review the latest scientific research and make any necessary changes to the vaccination schedule. The CDC officially sets the schedule based on ACIP’s recommendations, and the schedule is also approved by the AAP, AAFP and the American College of ...
and greater entrenchment of anti-vaccine views. Entrenchment of anti-vaccine sentiment would make coercive measures both increasingly necessary and more difficult to implement; it is unclear whether the public has the appetite for that.
答案见上24C 细节理解题,根据第一段中“The only shot I received was for tetanus when I was two months old"可知选C。 25D 细节理解题。根据第二段中的The school doctor would tell me I hadn't reccived any of the necessary shots to attend school.(校医 会告诉我,我没有接种过任何上学所必需的...
根据第二段"The school doctor would tell me I hadn’t received any of the necessary shots to attend school. But the same thing occurred each time: my mom would free me from the shots and nothing would happen.(校医会告诉我,我没有打过上学所必需的预防针。但每一次都发生了同样的事情:我妈妈...
The California Teachers Association and the California Federation of Teachers both cited state and national polling that indicates nearly 90% of educators have been vaccinated but said the rising spread of the delta variant, particularly among children, makes the new policy necessary. Children under 12...