“Thinking that we’ll be able to achieve some kind of threshold where there’ll be no more transmission of infections may not be possible,” Jones acknowledged last week to members of a panel that advises the CDC on vaccines. Vaccines have been quite effective at preventing cases of COVID-19 that lead to severe illness and death, but none has proved reliable at blocking transmission of the virus, Jones noted. Recent evidence has also made clear that the immunity provided by vaccines can wane in a matter of months. The result is that even if vaccination were universal, the coronavirus would probably continue to spread. “We would discourage” thinking in terms of “a strict goal,” he said.
Vaccines have been quite effective at preventing cases of COVID-19 that lead to severe illness and death, but none has proved reliable at blocking transmission of the virus, Jones noted. Recent evidence has also made clear that the immunity provided by vaccines can wane in a matter of months.
The result is that even if vaccination were universal, the coronavirus would probably continue to spread. “We would discourage” thinking in terms of “a strict goal,” he said.
没有CDC， 美国疫情会好很多。
herd immunity是不可能的。因为哺乳动物都会感染。
basic science
那些参加疫苗注射、疫苗trial的诊所、医院也都有疫苗相关收入吗？