MADRID -- A Spanish study on mixing COVID-19 vaccines has found that giving a dose of Pfizer's drug to people who already received a first shot of AstraZeneca vaccine is highly safe and effective, the researchers said on Tuesday.
The so-called Combivacs study, run by Spain's state-backed Carlos III Health Institute, found the immune response in people who received a Pfizer shot was between 30 and 40 times greater than in a control group who only had AstraZeneca dose.
Few serious side effects were reported among the 600 participants, the authors said.
https://news.google.com/__i/rss/rd/articles/CBMiiQFodHRwczovL3d3dy5jdHZuZXdzLmNhL2hlYWx0aC9jb3JvbmF2aXJ1cy9zcGFuaXNoLXN0dWR5LWZpbmRzLWFzdHJhemVuZWNhLXZhY2NpbmUtZm9sbG93ZWQtYnktcGZpemVyLWRvc2UtaXMtc2FmZS1hbmQtZWZmZWN0aXZlLTEuNTQzMzQ1MdIBRWh0dHBzOi8vYmV0YS5jdHZuZXdzLmNhL25hdGlvbmFsL2Nvcm9uYXZpcnVzLzIwMjEvNS8xOC8xXzU0MzM0NTEuaHRtbA?oc=5
2021-05-18 21:48:00Z
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