England have been forced to name a new squad to face Pakistan after seven members of the ODI party tested positive for coronavirus.
The England and Wales Cricket Board (ECB) revealed three players and four members of the management team returned positive tests in Bristol on Monday and will observe a period of self-isolation.
Due to being deemed as close contacts, the remaining members of the ODI party must also isolate.
The ECB confirmed both the T20 and ODIs against Pakistan will go ahead, with the fit-again Ben Stokes returning to captain the side and a squad will be announced later on Tuesday.
Incoming squad and support team members will follow PCR tests and bridging protocols to ensure safe entry to camp.
ECB chief executive Tom Harrison said: "We have been mindful that the emergence of the Delta variant, along with our move away from the stringent enforcement of bio secure environments, could increase the chances of an outbreak.
"We made a strategic choice to try to adapt protocols, in order to support the overall wellbeing of our players and management staff who have spent much of the last 14 months living in very restricted conditions.
"Overnight we have worked swiftly to identify a new squad, and we are grateful to Ben Stokes who will return to England duties to captain.
"We also recognise the impact this news will have on our First Class Counties and their men's playing squads and thank them."
England secured a 2-0 ODI series win over Sri Lanka, with no result possible in the final match in Bristol on Sunday due to rain.