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| ‘Wake-up call’: New Mayo Clinic study shows Pfizer vaccine may only be 42% effective against Delta variant, Moderna 76% | ‘Wake-up call’: New Mayo Clinic study shows Pfizer vaccine may only be 42% effective against Delta variant, Moderna 76% |
| (2 months later) | |
| A new preprint study has shown that both the Pfizer and Moderna coronavirus vaccines are much less effective against the fast-spreading Delta variant, a fact a White House official has said is a wake-up call. | A new preprint study has shown that both the Pfizer and Moderna coronavirus vaccines are much less effective against the fast-spreading Delta variant, a fact a White House official has said is a wake-up call. |
| The Mayo Clinic study showed that the Pfizer vaccine was only 42% effective against Covid-19 in July, a month when health officials repeatedly warned the public that the Delta variant was more transmittable and leading to rapid rises in cases. | The Mayo Clinic study showed that the Pfizer vaccine was only 42% effective against Covid-19 in July, a month when health officials repeatedly warned the public that the Delta variant was more transmittable and leading to rapid rises in cases. |
| The Moderna vaccine, on the other hand, was found to be 76% effective in protecting from the virus that same month. | The Moderna vaccine, on the other hand, was found to be 76% effective in protecting from the virus that same month. |
| Those numbers are fairly significant drop-offs from the rest of the year. Comparing the effectiveness of the Moderna and Pfizer vaccines from January to July, their overall efficacy was 86% and 76%, respectively. | Those numbers are fairly significant drop-offs from the rest of the year. Comparing the effectiveness of the Moderna and Pfizer vaccines from January to July, their overall efficacy was 86% and 76%, respectively. |
| In terms of hospitalizations, both were more reliable, with Moderna being 92% effective at preventing severe cases requiring hospitalization from coronavirus, while Pfizer was 85% effective. | In terms of hospitalizations, both were more reliable, with Moderna being 92% effective at preventing severe cases requiring hospitalization from coronavirus, while Pfizer was 85% effective. |
| Comparing numbers from multiple states, including Florida and Minnesota, the data consistently showed that Moderna likely presents less of a risk of a breakthrough infection. | Comparing numbers from multiple states, including Florida and Minnesota, the data consistently showed that Moderna likely presents less of a risk of a breakthrough infection. |
| Venky Soundararajan, a lead author of the study, said that the results show that both the stronger Delta variant and a reduction in long-term effectiveness are “both factors” behind the lower numbers. | Venky Soundararajan, a lead author of the study, said that the results show that both the stronger Delta variant and a reduction in long-term effectiveness are “both factors” behind the lower numbers. |
| “The Moderna vaccine is likely – very likely – more effective than the Pfizer vaccine in areas where Delta is the dominant strain, and the Pfizer vaccine appears to have a lower durability of effectiveness,” Soundararajan said, according to Axios. | “The Moderna vaccine is likely – very likely – more effective than the Pfizer vaccine in areas where Delta is the dominant strain, and the Pfizer vaccine appears to have a lower durability of effectiveness,” Soundararajan said, according to Axios. |
| The new study has yet to be peer reviewed, but the team behind the research is already reportedly working on a followup study that will more specifically look at the durability of the vaccines against the Delta variant. | The new study has yet to be peer reviewed, but the team behind the research is already reportedly working on a followup study that will more specifically look at the durability of the vaccines against the Delta variant. |
| The surprising study trended on social media on Thursday, with many people expressing shock, using the results to question the effectiveness of the vaccines and suggesting acquiring “natural immunity” was a better option. | The surprising study trended on social media on Thursday, with many people expressing shock, using the results to question the effectiveness of the vaccines and suggesting acquiring “natural immunity” was a better option. |
| Even officials in President Joe Biden’s administration are reportedly worried about the study. One unidentified “senior Biden official” told Axios the results are a wake-up call. | Even officials in President Joe Biden’s administration are reportedly worried about the study. One unidentified “senior Biden official” told Axios the results are a wake-up call. |
| “If that's not a wakeup call, I don't know what is,” they said. | “If that's not a wakeup call, I don't know what is,” they said. |
| Concerns about the long-term effectiveness of coronavirus vaccines have mounted in recent weeks as health officials have repeatedly warned about a potential surge of cases in the fall. | Concerns about the long-term effectiveness of coronavirus vaccines have mounted in recent weeks as health officials have repeatedly warned about a potential surge of cases in the fall. |
| White House medical advisor Dr. Anthony Fauci has said booster shots will likely be required for the already vaccinated soon enough. | White House medical advisor Dr. Anthony Fauci has said booster shots will likely be required for the already vaccinated soon enough. |
| “It’s likely that that will happen at some time in the future,” Fauci told ‘CBS This Morning’ on Thursday. “We’re already starting to see indications in some sectors about a diminution over time, that’s durability.” | “It’s likely that that will happen at some time in the future,” Fauci told ‘CBS This Morning’ on Thursday. “We’re already starting to see indications in some sectors about a diminution over time, that’s durability.” |
| He added that booster shots will likely only be needed in the short-term future for the “immune compromised.” | He added that booster shots will likely only be needed in the short-term future for the “immune compromised.” |
| If you like this story, share it with a friend! | If you like this story, share it with a friend! |