Pfizer working on booster shot to protect against COVID-19 variants

Pfizer working on booster shot to protect against COVID-19 variants

Source: 
Reuters
snippet: 

Pfizer Inc said on Tuesday that along with partner BioNTech Se it was developing a booster shot to protect against COVID-19 variants.

“We are already laying the groundwork to respond quickly if a variant of SARS-CoV-2 shows evidence of escaping immunity by our vaccine,” Pfizer said in an email to Reuters.