- July 9, 2021
- Posted by: Stratford Team
- Category: Business
Although vaccines work well against the Delta variant, the level of protection they offer seems to depend largely on whether you’ve completed your vaccination course. A study published Thursday in the journal Nature found that just a single dose of Pfizer’s or AstraZeneca’s vaccines — both of which require two shots — was either weakly or not at all effective against Delta.
The researchers performed laboratory experiments on blood samples from people who had received one of those shots. After a single dose, just 10% of those samples had developed antibodies that neutralized the Delta variant — a sign that those individuals would be protected from a symptomatic infection. After two doses, however, 95% of samples had developed neutralizing antibodies against Delta.
The researchers concluded that the Delta variant “partially but significantly escapes” immune protection from vaccines.