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Scientists carried out tests using delta and omicron that ‘could have combined the two variants and leaked from the laboratory’

Mecklenburg vorpommernUnited kingdomCity ofChristian dorstenLorenz ulrichFilippa lentzosKing college londonCentre for scienceBerlin university of medicineImperial college londonUniversity of oxfordUnited kingdom health security agencySecurity studies at king college londonCollege londonSafety executiveSecurity studies