Pfizer CEO Albert Bourla talks during a press conference with European Commission President after a visit to oversee the production of the Pfizer-BioNtech Covid-19 vaccine at the factory of US pharmaceutical company Pfizer, in Puurs, on April 23, 202 Pfizer CEO Albert Bourla on Tuesday said the company believes a COVID-19 vaccine-resistant variant will likely one day emerge, though the company has a system in place to turn around a variant-specific jab within some three months."Every time that the variant appears in the world, our scientists are getting their hands around it," Bourla told FOX News’ America’s Newsroom cohosts. "They are researching to see if this variant can escape the protection of our vaccine.