Vaccination record card ,NACI updated its advice on mixing and matching vaccines considering the risks of rare but serious blood clots linked with the AstraZeneca vaccine. -19fake Covid-19 vaccine record card for sale online.
As of May 12, Canada has reported one case of vaccine-induced immune thrombotic thrombocytopenia (VITT) in every 83,000 people who received a first dose of the AstraZeneca shot.
Tam noted that the rate of VITT seems to be lower after the second dose of the AstraZeneca vaccine. “Right now, it’s one in 600,000 people but that could change,” she said at a briefing.
According to NACI, VITT rates have generally increased with observation times. fake Covid-19 vaccine record card for sale online safely and cheap.
Prior to the guidance change, several provinces had already announced that they would give people who received the AstraZeneca vaccine the option to receive a Pfizer or fake Covid-19 vaccine record card for sale online.shot for their second dose.
However, the evidence for mixing and matching COVID-19 vaccines is still emerging.
NACI’s recommendations are based on three studies, each involving several hundred participants, which reported no serious adverse events among adults who received a Pfizer shot after a first dose of the AstraZeneca vaccine.
One of the studies noted an increase in short-term side effects including fatigue, headaches, and chills compared to people who received the AstraZeneca vaccine for both shots.
And none of the studies were large enough to capture rare adverse events like VITT. Even so, NACI concluded that mixed schedules appear to have an “acceptable safety profile.”
Some experts have speculated that mixing and matching COVID-19 vaccines could boost their effectiveness by triggering stronger or broader immune responses.
Preliminary data from the CombiVacS trial in Spain indicated that humoral immune responses after a first dose of the AstraZeneca vaccine increased following a Pfizer booster. But there are no data comparing those results to the immune responses triggered by two doses of the AstraZeneca vaccine.
Likewise, no data currently exists on the interchangeability of Pfizer and Moderna’s vaccines. According to NACI, the products are so similar there is no reason to believe that swapping them “would result in any additional safety issues or deficiency of protection.” fake Covid-19 vaccine record card for sale online.