The National Advisory Committee on Immunization of Canada (NACI) issued the latest guidance on COVID-19 vaccination on June 17, local time.The guidance recommends that provinces should refrain from vaccinating AstraZeneca in most cases. Even those who received the first dose of AstraZeneca vaccine should switch to other vaccines, such as Pfizer or Moxa, which are mRNA vaccines. Dana vaccine.
The guidance said: “mRNA vaccines can now be given priority to those who have received the first dose of AstraZeneca vaccine. According to increasing evidence, mixed vaccination can trigger a better response mechanism for the immune system.” The mixed vaccination mentioned here means that people who have received the first dose of AstraZeneca vaccine, and the second dose of other types of new crown vaccines will have a good protective effect.
For people who have been vaccinated with two doses of AstraZeneca vaccine, the guidance stated that this vaccine will still provide good protection and avoid serious illness or death after being infected with the new coronavirus.
In early May of this year, after the Advisory Committee on Immunization issued guidance on the risk of thrombosis caused by the AstraZeneca vaccine, the provinces basically no longer allow the use of this vaccine for the first dose, but also allow it for the second dose. . The new evidence found that those who received the second dose of AstraZeneca vaccine are still at risk of blood clots. In this case, the committee issued the above-mentioned guidance.
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