UK regulator: People should keep getting AstraZeneca shots
Discarded in the safe disposal box are used syringes, that were used to give patient their 1st doses for the AstraZeneca COVID-19 vaccine at the Wheatfield surgery in Luton, England, Thursday, March 18, 2021. The world is awaiting the results of an initial European investigation into whether there is any evidence that the AstraZeneca coronavirus vaccine was behind unusual blood clots reported in some recipients of the shot. (AP Photo/Alastair Grant)

Discarded in the safe disposal box are used syringes, that were used to give patient their 1st doses for the AstraZeneca COVID-19 vaccine at the Wheatfield surgery in Luton, England, Thursday, March 18, 2021. The world is awaiting the results of an initial European investigation into whether there is any evidence that the AstraZeneca coronavirus vaccine was behind unusual blood clots reported in some recipients of the shot. (AP Photo/Alastair Grant)

Mar. 18, 2021 08:41 AM EDT
Pharmacy Technician Katrina Bonwick draws a does of the AstraZeneca COVID-19 vaccine ready for use at the Wheatfield surgery in Luton, England, Thursday, March 18, 2021. The world is awaiting the results of an initial European investigation into whether there is any evidence that the AstraZeneca coronavirus vaccine was behind unusual blood clots reported in some recipients of the shot. (AP Photo/Alastair Grant)

Pharmacy Technician Katrina Bonwick draws a does of the AstraZeneca COVID-19 vaccine ready for use at the Wheatfield surgery in Luton, England, Thursday, March 18, 2021. The world is awaiting the results of an initial European investigation into whether there is any evidence that the AstraZeneca coronavirus vaccine was behind unusual blood clots reported in some recipients of the shot. (AP Photo/Alastair Grant)

Mar. 18, 2021 07:50 AM EDT
A vial of the AstraZeneca COVID-19 vaccine ready for use at the Wheatfield surgery in Luton, England, Thursday, March 18, 2021. The world is awaiting the results of an initial European investigation into whether there is any evidence that the AstraZeneca coronavirus vaccine was behind unusual blood clots reported in some recipients of the shot. (AP Photo/Alastair Grant)

A vial of the AstraZeneca COVID-19 vaccine ready for use at the Wheatfield surgery in Luton, England, Thursday, March 18, 2021. The world is awaiting the results of an initial European investigation into whether there is any evidence that the AstraZeneca coronavirus vaccine was behind unusual blood clots reported in some recipients of the shot. (AP Photo/Alastair Grant)

Mar. 18, 2021 07:52 AM EDT
FILE - In this Jan. 11, 2021, file photo, a man receives an injection of the AstraZeneca vaccine at the mass vaccination program in Newcastle Upon Tyne, England. In recent days, countries including Denmark, Ireland and Thailand have temporarily suspended their use of AstraZeneca's coronavirus vaccine after reports that some people who got a dose developed blood clots, even though there's no evidence that the shot was responsible. The European Medicines Agency and the World Health Organization say the data available do not suggest the vaccine caused the clots.​ Britain and several other countries have stuck with the vaccine. (AP Photo/Scott Heppell, File)

FILE - In this Jan. 11, 2021, file photo, a man receives an injection of the AstraZeneca vaccine at the mass vaccination program in Newcastle Upon Tyne, England. In recent days, countries including Denmark, Ireland and Thailand have temporarily suspended their use of AstraZeneca's coronavirus vaccine after reports that some people who got a dose developed blood clots, even though there's no evidence that the shot was responsible. The European Medicines Agency and the World Health Organization say the data available do not suggest the vaccine caused the clots.​ Britain and several other countries have stuck with the vaccine. (AP Photo/Scott Heppell, File)

Mar. 15, 2021 08:33 AM EDT
A vial of the AstraZeneca COVID-19 vaccine ready for use at the Wheatfield surgery in Luton, England, Thursday, March 18, 2021. (AP Photo/Alastair Grant)

A vial of the AstraZeneca COVID-19 vaccine ready for use at the Wheatfield surgery in Luton, England, Thursday, March 18, 2021. (AP Photo/Alastair Grant)

Mar. 18, 2021 08:01 AM EDT
FILE - In this Feb. 5, 2021, file photo, vials AstraZeneca vaccine ready to be used at the Wellcome Centre in London. In recent days, countries including Denmark, Ireland and Thailand have temporarily suspended their use of AstraZeneca's coronavirus vaccine after reports that some people who got a dose developed blood clots, even though there's no evidence that the shot was responsible. The European Medicines Agency and the World Health Organization say the data available do not suggest the vaccine caused the clots. Britain and several other countries have stuck with the vaccine. (AP Photo/Frank Augstein, File)

FILE - In this Feb. 5, 2021, file photo, vials AstraZeneca vaccine ready to be used at the Wellcome Centre in London. In recent days, countries including Denmark, Ireland and Thailand have temporarily suspended their use of AstraZeneca's coronavirus vaccine after reports that some people who got a dose developed blood clots, even though there's no evidence that the shot was responsible. The European Medicines Agency and the World Health Organization say the data available do not suggest the vaccine caused the clots. Britain and several other countries have stuck with the vaccine. (AP Photo/Frank Augstein, File)

Mar. 15, 2021 08:23 AM EDT
A woman at the Wheatfield surgery is given a 1st shot of the AstraZeneca COVID-19 vaccine by Dr Christian Owusu-Yianoma in Luton, England, Thursday, March 18, 2021. (AP Photo/Alastair Grant)

A woman at the Wheatfield surgery is given a 1st shot of the AstraZeneca COVID-19 vaccine by Dr Christian Owusu-Yianoma in Luton, England, Thursday, March 18, 2021. (AP Photo/Alastair Grant)

Mar. 18, 2021 07:54 AM EDT
A vial and syringes ready for use of the AstraZeneca COVID-19 vaccine at the Wheatfield surgery in Luton, England, Thursday, March 18, 2021. The world is awaiting the results of an initial European investigation into whether there is any evidence that the AstraZeneca coronavirus vaccine was behind unusual blood clots reported in some recipients of the shot. (AP Photo/Alastair Grant)

A vial and syringes ready for use of the AstraZeneca COVID-19 vaccine at the Wheatfield surgery in Luton, England, Thursday, March 18, 2021. The world is awaiting the results of an initial European investigation into whether there is any evidence that the AstraZeneca coronavirus vaccine was behind unusual blood clots reported in some recipients of the shot. (AP Photo/Alastair Grant)

Mar. 18, 2021 07:50 AM EDT