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Vaccine Watch: Are vaccines effective against variants?
Covid vaccines 'still effective' against Delta variant - BBC News
Moderna and Pfizer COVID vaccines shown to be effective against variants
How effective are COVID-19 vaccines against variants?
The effectiveness of Covid-19 vaccines against variants
How Effective Are Pfizer & Covishield (AstraZeneca) Vaccines Against Variant Found In India?
Covid: Vaccines effective against Indian variant, study finds | ITV News
Study: COVID vaccines effective against variants
Are vaccines effective against Indian variant of Covid-19? Find out
Types of vaccines and how they work, efficacy/effectiveness
Vaccine Watch: How effective are vaccines in slowing COVID-19?
AstraZeneca, Pfizer vaccines effective against Delta COVID-19 variants: study
