beyrer, with us. we expect your -- we kept your calls. -- we accept your calls. 202-748-8000 for the eastern and central time zones. 202-748-8001 for mountain and pacific time zones. ablehad anticipated being to deliver 40 million doses of a vaccine perhaps by the end of this year. beyrer, how many doses have to be administered for it to become an effective vaccine? guest: this is an important point to understand. is a goodk that estimate, it probably will be 40 million doses by the end of the year. vaccinesber, these being tested right now prevent serious disease but adult prevent infection -- but they don't prevent infection. we don't know how they will play out in terms of word immunity -- in terms of heard -- herd immunity. we don't know that yet. that is an investigative question. been anainly, there has effort to figure out what would be the right allocation or pop maximum impact and protection of the most vulnerable and those like health-care workers and frontline responders. that is where we w

chris beyrer with us until about 8:55 eastern. we welcome your calls and comments, 748-8000. 202-748-8001. for mountain and pacific regions, 202-748-8002. operation warp speed said last week they had anticipated being able to deliver 40 million doses of the vaccine perhaps by the end of this year, 2020. dr. beyrer, how many doses have to be administered in the u.s. for it to become an effective vaccine? >> this is an important point to understand. so, first of all, that is -- we do think that is a good estimate. there probably will be 40 million doses by the end of the year. but, remember, these vaccines, all the vaccines that are being tested right now prevent disease, serious disease, but they don't prevent infection. so we don't know yet how they're going to play out in terms of this concept of herd immunity and what effect being immunized, having had a vaccine, will do for whether or not you can then still get infected and spread covid. we don't know that yet, so that's an investigative question. but certainly there has been a

chris beyrer. also, social security works president nancy altman discusses her group's efforts on social security reform. "washington journal" is next. ♪ another covid-19 vaccine lining up for -- has lined up for approval. increasing the likelihood that americans can begin to be getting vaccinated by mid-december. good morning, this is "washington journal," for december 1, 2020. when the vaccine comes out, will you get vaccinated? if you say yes you will, (202) 748-8000. if your answer is no, (202) 748-8001. tell us why or why not, some of your concerns. if you are undecided, (202) 748-8002. you can text us, (202) 748-8003. include your name, tell us where you are texting from. on twitter, we are @cspanwj. we will look for your posts as well on our facebook page. we start this morning on the modernage of usa today, applied monday for an emergency use authorization from the u.s. food and drug administration after receiving more good news about the safety and effectiveness of its covid-19 vaccine. th

chris beyrer. then, nancy altman talks about priorities on social security reform. watch washington journal live at 7:00 a.m. eastern on tuesday morning. makes sure you join the conversation with your calls, facebook comments, and tweets. announcer: tuesday, treasury secretary steven mnuchin and federal reserve chair jerome powell are on capitol hill for a senate hearing on the coronavirus response. that is live at 10:00 a.m. eastern. future of00 p.m., the economic policy with the brookings institution. on c-span2, the senate returns at 10:00 a.m. eastern to consider executive and judicial nominations. at 12:30 p.m., president-elect joe biden introduces his economic team, which includes the nomination of janet yellen as treasury secretary. announcer: on monday, the white house showed their christmas decorations with the theme "america the beautiful." here is a look.

chris beyrer. then, nancy altman talks about priorities on social security reform. watch washington journal live at 7:00 a.m. eastern on tuesday morning. makes sure you join the conversation with your calls, facebook comments, and tweets. announcer: tuesday, treasury secretary steven mnuchin and federal reserve chair jerome powell are on capitol hill for a senate hearing on the coronavirus response. that is live at 10:00 a.m. eastern. future of00 p.m., the economic policy with the brookings institution. on c-span2, the senate returns at 10:00 a.m. eastern to consider executive and judicial nominations. at 12:30 p.m., president-elect joe biden introduces his economic team, which includes the nomination of janet yellen as treasury secretary. announcer: on monday, the white house showed their christmas decorations with the theme "america the beautiful." here is a look. washington also unveiled its christmas decorations today. here is a look. >> and a look at some of the christmas decorations on display this year at the vice president's residence.