vaccine candidate.The four states – Rhode Island, Texas, New Mexico, and Tennessee – were selected for the program because of their differences in overall size, diversity of populations and immunization infrastructure, the drugmaker said in a statement."The four states included in this pilot program will not receive vaccine doses earlier than other states by virtue of this pilot, nor will they receive any differential consideration," Pfizer said.Global hopes of vanquishing the coronavirus pandemic were boosted Monday after a vaccine was found to be nearly 95 percent effective in a trial, bringing much-needed optimism amid surging infections and grueling new restrictions.The news from the US biotech firm Moderna comes after similar results.