Carpenters, electricians and wiring and furniture installers moved tools and buckets swiftly though the four-story office building at Franklin and West Eagle streets this month. "Excuse me," repeated a steady stream of passing workers trying to squeeze by on a historic staircase that may have once supported the feet of U.S. presidents more than 150 years ago. Welcome to the soon-to-be-renamed Lincoln Building. The site, which once served as a school and historic worship space, is being transformed into a new $5.4 million hub for Erie County's fight against Covid-19. The county's epidemiology team, which includes Covid-19 case investigators and call takers, is slated to move into the renovated building during the first week of January.