In Uganda, remote islands test delivery of COVID-19 vaccines
A couple wait for the AstraZeneca COVID-19 vaccine at the Butanda Health Centre III in Western Uganda, Tuesday, April 27, 2021. The Uganda government has embarked on vaccinating people in hard to reach areas. Remote islands in Uganda have tested the efforts of health officials delivering COVID-19 vaccine doses as global efforts to access hard-to-reach areas continue. (AP Photo/Patrick Onen)

A couple wait for the AstraZeneca COVID-19 vaccine at the Butanda Health Centre III in Western Uganda, Tuesday, April 27, 2021. The Uganda government has embarked on vaccinating people in hard to reach areas. Remote islands in Uganda have tested the efforts of health officials delivering COVID-19 vaccine doses as global efforts to access hard-to-reach areas continue. (AP Photo/Patrick Onen)

Apr. 30, 2021 09:37 AM EDT
A nurse administers the AstraZeneca COVID-19 vaccine to a woman at the Butanda Health Centre III in Western Uganda, Tuesday, April 27, 2021. The Uganda government has embarked on vaccinating people in hard to reach areas. Remote islands in Uganda have tested the efforts of health officials delivering COVID-19 vaccine doses as global efforts to access hard-to-reach areas continue. (AP Photo/Patrick Onen)

A nurse administers the AstraZeneca COVID-19 vaccine to a woman at the Butanda Health Centre III in Western Uganda, Tuesday, April 27, 2021. The Uganda government has embarked on vaccinating people in hard to reach areas. Remote islands in Uganda have tested the efforts of health officials delivering COVID-19 vaccine doses as global efforts to access hard-to-reach areas continue. (AP Photo/Patrick Onen)

Apr. 30, 2021 09:40 AM EDT
A nurse prepares the AstraZeneca COVID-19 vaccine at the Butanda Health Centre III in Western Uganda, Tuesday, April 27, 2021. The Uganda government has embarked on vaccinating people in hard to reach areas. Remote islands in Uganda have tested the efforts of health officials delivering COVID-19 vaccine doses as global efforts to access hard-to-reach areas continue. (AP Photo/Patrick Onen)

A nurse prepares the AstraZeneca COVID-19 vaccine at the Butanda Health Centre III in Western Uganda, Tuesday, April 27, 2021. The Uganda government has embarked on vaccinating people in hard to reach areas. Remote islands in Uganda have tested the efforts of health officials delivering COVID-19 vaccine doses as global efforts to access hard-to-reach areas continue. (AP Photo/Patrick Onen)

Apr. 30, 2021 09:37 AM EDT
A nurse prepares to administer the AstraZeneca COVID-19 vaccine to a man at the Bwama Health Centre III in Western Uganda, Wednesday April 28, 2021. Uganda government has embarked on vaccinating people in hard to reach areas., Remote islands in Uganda have tested the efforts of health officials delivering COVID-19 vaccine doses as global efforts to access hard-to-reach areas continue. (AP Photo/Patrick Onen)

A nurse prepares to administer the AstraZeneca COVID-19 vaccine to a man at the Bwama Health Centre III in Western Uganda, Wednesday April 28, 2021. Uganda government has embarked on vaccinating people in hard to reach areas., Remote islands in Uganda have tested the efforts of health officials delivering COVID-19 vaccine doses as global efforts to access hard-to-reach areas continue. (AP Photo/Patrick Onen)

Apr. 30, 2021 09:39 AM EDT
An elderly woman and her daughter leave the Bwama Health Centre III, at Bwama Island – Lake Bunyonyi, in Western Uganda, Wednesday, April 28, 2021, after receiving her COVID-19 vaccination. The Uganda government has embarked on vaccinating people in hard to reach areas. Remote islands in Uganda have tested the efforts of health officials delivering COVID-19 vaccine doses as global efforts to access hard-to-reach areas continue. (AP Photo/Patrick Onen)

An elderly woman and her daughter leave the Bwama Health Centre III, at Bwama Island – Lake Bunyonyi, in Western Uganda, Wednesday, April 28, 2021, after receiving her COVID-19 vaccination. The Uganda government has embarked on vaccinating people in hard to reach areas. Remote islands in Uganda have tested the efforts of health officials delivering COVID-19 vaccine doses as global efforts to access hard-to-reach areas continue. (AP Photo/Patrick Onen)

Apr. 30, 2021 09:40 AM EDT
A woman waits for the AstraZeneca COVID-19 vaccine at the Butanda Health Centre III in Western Uganda, Tuesday, April 27, 2021. The Uganda government has embarked on vaccinating people in hard to reach areas. Remote islands in Uganda have tested the efforts of health officials delivering COVID-19 vaccine doses as global efforts to access hard-to-reach areas continue. (AP Photo/Patrick Onen)

A woman waits for the AstraZeneca COVID-19 vaccine at the Butanda Health Centre III in Western Uganda, Tuesday, April 27, 2021. The Uganda government has embarked on vaccinating people in hard to reach areas. Remote islands in Uganda have tested the efforts of health officials delivering COVID-19 vaccine doses as global efforts to access hard-to-reach areas continue. (AP Photo/Patrick Onen)

Apr. 30, 2021 09:37 AM EDT