When it comes to SARS-CoV-2, the virus that causes Covid-19, “wastewater can detect an increase in cases 4 to 6 days before we might see these cases show up through a rise in positive tests,” CDC Director Dr. The US Centers for Disease Control and Prevention has been collecting wastewater data from about 650 sewersheds - representing about a quarter of the US population - to study how much coronavirus may be in the area. In December, the CDC recommended the Pfizer and Moderna vaccines over the Johnson & Johnson shot due to data suggesting a rare blood clotting syndrome called TTS is more common among some people who got a J&J vaccine – particularly women ages 30 to 49. Dan Barouch, director of the Center for Virology and Vaccine Research at Beth Israel Deaconess Medical Center in Boston.īut far more Americans have received the Pfizer or Moderna vaccines than the Johnson & Johnson vaccine. “Over time, the efficacy of the Pfizer and Moderna vaccines goes down, the efficacy of the J&J vaccines remains stable,” said Dr. Johnson & Johnson’s vaccine might not spark as strong of an immune response shortly after vaccination, but it’s known to have greater durability. So while studies have shown the Pfizer and Moderna mRNA vaccines prompt a powerful immune response, it can wane over time. The study also showed the J&J vaccine provided lasting immunity at least 6 months after vaccination. And the odds of getting Covid-19 were more than 3 times higher for unvaccinated people compared to those who got the Johnson & Johnson vaccine.Ī study published March 17 in the medical journal JAMA Network Open found the Johnson & Johnson vaccine was 76% effective in preventing Covid-19 infections and 81% effective in preventing Covid-related hospitalizations before and during the Delta surge. During the Delta and Omicron surges, unvaccinated people were more than twice as likely to get infected compared to those who got Pfizer or Moderna shots. Those vaccinated with the Johnson & Johnson shot had the lowest incidence of breakthrough infections.īut any vaccine is better than no vaccine at all. In January, during the Omicron surge, breakthrough infections were highest among those who received the Pfizer/BioNTech vaccine, followed by people who got the Moderna vaccine. A recent CNN analysis of data from the US Centers for Disease Control and Prevention showed the Johnson & Johnson vaccine had the lowest breakthrough infection rate during a 5-week span starting in late December - the latest 5 weeks of available data.
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