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nbsp;CLICK HERE FOR COMPLETE CORONAVIRUS COVERAGEIf the variants become impervious to our vaccines, it's pretty simple to modify Pfizer's and Moderna's mRNA vaccines, to create booster shots by swapping out the genetic sequence used to teach the body to recognize the spike protein with the new mutated sequence, Live Science previously reported. melissa and doug shape sorter VideoMeanwhile, after the riot, the Department of Homeland Security issued a National Terrorism Advisory System Bulletin after consulting with the intelligence community and federal law enforcement partners, warning that "there is currently a heightened threat environment across the United States that is likely to persist over the coming weeks. melissa and doug shape sorter Word of the forum comes as City Hall remains locked in a months-long, multi-party court fight over a Department of Homeless Services plan to shut down its operation inside of the Lucerne — which once housed as many as 280 homeless men — and relocate residents to a new facility built in a former Radisson hotel downtown, near Wall Street. melissa and doug shape sorter Last week, ahead of the FDA's emergency use authorization, Jeff Zients, White House COVID-19 coordinator, had said the Biden administration was working to further "accelerate the pace and timeframe" for which the company delivered the agreed-upon supply after learning that Johnson & Johnson had fallen behind in their production schedule. melissa and doug shape sorter