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The excitement of two COVID-19 vaccines with more than 90 percent efficacy is undeniable.In November, both Pfizer and Moderna announced its scientists had developed vaccines with efficacy at or near 95 percent, but scientists are warning these vaccines are not the "silver bullet" to ending the pandemic.“We don’t want to give the public the impression that there’s an emergency use authorization and these vaccines become available in a small amount in December and we can go back to our pre-pandemic behavior,” said William Moss, executive director of the International Vaccine Access Center at Johns Hopkins.In June, the FDA released its vaccine guidelines, saying it would consider emergency use authorization for any vaccine testing with at least 50 percent effectiveness, so there is a reason for celebration, according to Moss, but only after certain questions about the vaccine are answered.Dr. Anthony Fauci has said the initial vaccines will prevent symptoms in those who become infected, rather than kill the virus itself. Moss says that means immunized people might be able to spread COVID-19 to others.He also wonders how long immunization will last. One year? Three years? Will booster doses be needed? They're all careful considerations that will only emerge once one is put into play, according to Moss.“It’s obviously tragic that the [COVID] cases are occurring that quickly, but it does help a vaccine trial because otherwise you just have to wait that much longer for samples to come in,” said Moss.The vaccine process has innovated how scientists and researchers approach these types of situations, however, according to Moss.In traditional vaccines, a small dose of the virus is injected into the body so the immune system can create antibodies. In the COVID-19 vaccine, though, both Moderna and Pfizer have used what is called messenger RNA (mRNA) where the virus’ genetic code is injected into the body so it can instruct cells on what antibodies to produce. Scientists say this way is faster, safer, and can create a stronger immune response as people are not exposed to the virus.“I suspect that if this all goes well and these vaccines are safe and continue to demonstrate 90 to 95 percent efficacy, we’re going to see other vaccines of a similar type,” said Moss. 2298

The coronavirus vaccine has been administered to 1 million Americans in the last 10 days, the CDC reported on Wednesday.The first vaccinations were administered to Americans early last week after Pfizer’s coronavirus vaccine received an emergency use authorization. Pfizer said last week that it had distributed 2.9 million doses of the vaccine throughout the United States.Earlier this week, Moderna’s coronavirus vaccine candidate began being administered to Americans.So far, there have been over 9.4 million doses of the vaccine distributed throughout the US. Getting them administered is taking some time.Although 1 million vaccinations is a significant milestone, it is a fraction of the vaccinations needed to stop the spread of the virus. The first round of vaccinations are intended for 24 million Americans who work in health care settings or who live or work assisted living facilities. The next step will be to vaccinate 21 million Americans over the age of 75 and 30 million front-line workers, such as teachers, first responders and grocery store employees.“While we celebrate this historic milestone, we also acknowledge the challenging path ahead,” CDC director Robert Redfield said in a statement. “There is currently a limited supply of COVID-19 vaccine in the U.S., but supply will increase in the weeks and months to come. The goal is for everyone to be able to easily get vaccinated against COVID-19 as soon as large enough quantities are available.”Those who have received their first dose of the vaccine will need to return for a booster in 21 to 28 days, depending on the vaccine administered. 1625

The election is days away, and ballots across the country are already being cast in person, via mail. Billed as one of the most important elections of our time, ABC 10News D.C. Correspondent Joe St. George joins us to talk about the presidential election, what to watch for in Thursday's dueling town halls, and to explain how Nevada and Arizona could play a major role in deciding our next president.You can join us at 9:30 a.m. for the conversation right here on our ABC 10News Facebook page. 502

The coronavirus pandemic may have started earlier than previously thought, according to scientists from the CDC.A study from government scientists published November 30 appears to confirm what some health experts have suggested, patients infected with COVID-19 were in the US before the beginning of 2020.“The findings of this report suggest that SARS-CoV-2 infections may have been present in the U.S. in December 2019, earlier than previously recognized. These findings also highlight the value of blood donations as a source for conducting SARS-CoV-2 surveillance studies,” the report states.The first officially documented case of COVID-19 in the US was reported on January 19, a person who had returned to the US after traveling from China.The World Health Organization was alerted to the novel coronavirus by officials in Wuhan, China on December 31, 2019. The CDC researchers say further reports have identified a patient in Wuhan with COVID-19 symptoms as early as December 1, 2019.The study looked at more than 7,000 routine blood donation samples taken by the American Red Cross from people in nine states between December 13, 2019 and January 17, 2020.They found COVID-19 antibodies in 106 samples, mostly from the states of California, Oregon and Washington, from blood collected between December 13-16, 2019. Other samples that indicated COVID-19 antibodies were from Connecticut, Iowa, Massachusetts, Michigan, Rhode Island, and Wisconsin taken in early January 2020.“The presence of these serum antibodies indicate that isolated SARS-CoV-2 infections may have occurred in the western portion of the United States earlier than previously recognized or that a small portion of the population may have pre-existing antibodies that bind SARS-CoV-2,” the report states.Scientists acknowledge that patients presenting with what is now known as COVID-19 symptoms before mid-January would likely not have had clinical samples taken or kept because of how new the virus was. Therefore, the CDC used the existing repository collected by the American Red Cross during their routine blood donation process.“These specimens were previously archived for potential future studies to identify emerging transfusion-transmissible infections but were re-purposed for the present study,” researchers stated.Researchers caution that these results are subject to limitations. Although they detected antibodies, that does not mean they are “true positive” COVID-19 tests. In order to get a true positive, a different test would need to be a run. 2545

The European leg of Lady Gaga's "Joanne World Tour" has been postponed as the singer grapples with health issues, Live Nation announced Monday.In a statement posted on the promoter's site, Live Nation revealed that the portion of the tour that was set to begin September 21 in Barcelona, Spain, and conclude on October 28 in Koln, Germany, has been postponed until 2018."Lady Gaga is suffering from severe physical pain that has impacted her ability to perform," the statement read. "She remains under the care of expert medical professionals who recommended the postponement earlier today." 599