Both Pfizer and Moderna had submitted applications for their dual-strain vaccines to the European Medicines Agency (EMA) in mid-July, with the agency announcing on Thursday that both had been approved.
The vaccines target both the Omicron variant and the original strain of Covid, but do not specifically target the Omicron BA.4 and BA.5 sub-variants that have emerged as the global dominant strains in recent months.
The EMA approval comes after the US approved both vaccines on Wednesday, while the UK approved the Moderna dual-strain vaccine in mid-August.
Within the EU, countries have the choice of accepting the EMA recommendation straight out, or asking their own domestic health regulator to give its approval.
The dual-strain vaccines are widely expected to be used in Covid booster shot campaigns this autumn, which many countries plan to combine with the annual flu vaccination drive.