effective

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Israel runs back reported virus tsar claims Pfizer 1st dose less effective

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Pfizer vacancy is effective against COVID-19

Israel warns that a single dose of Pfizer vaccine ‘is less effective than we hoped’ against COVID-19, and could be a blow to US and UK strategies

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Fact Check: Effective (and Ineffective) COVID-19 Treatments | Coronavirus and Covid-19 – Latest News on COVID-19 | DW

Tell people the truth: COVID-19 vaccines are excellent and effective

Nachman Ash says Pfizer’s first dose less effective than indicated

Israel’s virus tsar says first dose less effective than Pfizer indicates – reports