And though the trials showed that the vaccines are very effective in preventing severe disease, hospitalization, and death, none were found to be 100% protective against infection, meaning that some trial participants had mild or asymptomatic COVID-19 cases, even after vaccination. In large part, it’s because the clinical trials for these vaccines were primarily focused on determining whether the vaccines protected against symptomatic COVID-19 infection. How can it be that after conducting clinical trials that involved tens of thousands of people, there was still uncertainty about whether the three authorized COVID-19 vaccines-from Pfizer-BioNTech, Moderna, and Johnson & Johnson-could prevent or reduce transmission? Trials focused on infection, not on transmission The CDC says that "studies are underway to understand the level and duration of transmissibility from Delta vaccine breakthrough infections." “This is likely due to the fact that people who are vaccinated are not becoming infected as often, but also that they are not ‘forward-transmitting’ the virus as often.”īut more research is needed. “When we look at vaccinations compared to cases on a population level-we see that as the number of people vaccinated rises, the number of cases decreases,” she says. ![]() Meyer, is that there is less circulating virus in the community as a result of vaccination. The CDC added that breakthrough infections “occur in only a small proportion of vaccinated people and of the breakthrough infections, transmission by the vaccinated appears to only be a small part of overall spread of the virus.” But the CDC says it does not yet have data on the likelihood of asymptomatic spread among vaccinated people. But the CDC report released in late July made it clear that some vaccinated people can get Delta in a breakthrough infection-and may be contagious. Until recently, scientists were unsure whether fully vaccinated people who became infected with COVID-19 could transmit it to others. ![]() We have to use the CDC data to reassess our understanding of our personal and community risk.” “Even though many people were ready to throw away their masks and get back to ‘normal’ life this summer, the latest spikes show us that the pandemic persists. Areas with low vaccination coverage are being hit especially hard with the highest daily case rates in months,” says Yale Medicine infectious diseases expert Jaimie Meyer, MD, MS. “The CDC data comes at a critical time, when cases-mostly due to the Delta variant-are on the rise in the U.S. According to recent reports from the Centers for Disease Control and Prevention (CDC), this can happen-a finding that may be a game-changer, affecting decisions on how to safely go back to school return to the office attend concerts or theater and sporting events and even whether it’s safe to date. And though these breakthrough cases are relatively rare, they are a reminder that the pandemic is far from over.Īpart from getting sick, there is also worry that with the Delta variant, a fully vaccinated person who becomes infected may spread the coronavirus to others. ![]() Many of us believed that the COVID-19 vaccines offered complete protection from infection, not just from severe disease and death. ![]() Here in the United States, many Americans are concerned for their unvaccinated loved ones, including children and those who are immuno-compromised-and given this news, for themselves as well. Because information about COVID-19 changes rapidly, we encourage you to visit the websites of the Centers for Disease Control & Prevention (CDC), World Health Organization (WHO), and your state and local government for the latest information.ĬOVID-19 breakthrough infections-where a fully vaccinated person becomes infected with the coronavirus-are occurring across the globe, due, in large part, to the highly contagious Delta variant. Note: Information in this article was accurate at the time of original publication.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |