The paper says: “In this study, we found that although the BNT162b2 (Pfizer) vaccine is extremely effective, rare breakthrough infections carry an infectious potential and create a special challenge, since such infections are often asymptomatic and may pose a risk to vulnerable populations.”
Of the infected workers, 31 percent reported persistent symptoms two weeks after their initial diagnosis.
And 19 percent said they experienced long Covid symptoms including loss of smell, cough, fatigue, weakness, shortness of breath, or muscle pain that lasted more than six weeks.
However, none were hospitalised.
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