During an earnings call, Moderna seemed to admit that their COVID-19 vaccine only lasts for 6 months, adding that a third “booster” shot will “likely be necessary” due to the Delta variant, which experts have compared to hay fever or the common cold. Moderna released a statement on Thursday claiming that their COVID-19 vaccine effectiveness “does not wane in the first 6 months after the second dose,” reported the New York Times. However, Moderna appeared to change their tune during an earnings call shortly after, claiming that booster shots would be necessary this fall to curb the Delta variant, which...