Vaccine makers Pfizer
PFE,
+0.05%,
BioNTech
BNTX,
-3.45%
and Moderna
MRNA,
-6.19%
each traded lower by 3% to 5% in premarket trade on Thursday, following the announcement from U.S. Trade Representative Katherine Tai that the U.S. supports the waiver of intellectual-property protections on COVID-19 vaccines. Another maker of COVID-19 vaccines, AstraZeneca
AZN,
+1.36%
AZN,
+0.31%,
was flat in London trade. Moderna also is scheduled to report earnings on Thursday.