Lizzie Kerr, 31, and Simon O'Brien, 36, embrace in a COVID-19 ward, days after they married in an ICU (Intensive Care Unit) when both had become critically ill with the coronavirus disease (COVID-19), and were uncertain of their chances of surviving, in Milton Keynes University Hospital, Milton Keynes, Britain, January 20, 2021. British couple Elizabeth Kerr and Simon O'Brien had been planning to marry in June. Then COVID-19 struck. REUTERS/Toby Melville

Simon O'Brien, 36, looks on as his wife, Elizabeth Kerr, 31, reacts as she speaks, in a COVID-19 ward, days after they married in an ICU (Intensive Care Unit) when both had become critically ill with the coronavirus disease (COVID-19), and were uncertain of their chances of surviving, in Milton Keynes University Hospital, Milton Keynes, Britain, January 20, 2021. Kerr and O'Brien became so ill that medical staff scrambled to organise a wedding before it was too late. When O'Brien's condition got even worse, it was decided he should be transferred to the intensive care unit (ICU). REUTERS/Toby Melville

Elizabeth Kerr, 31, and Simon O'Brien, 36, react as they speak with Rapid Response Nurse Hannah Cannon, in a COVID-19 ward, days after they married in an ICU (Intensive Care Unit) when both had become critically ill with the coronavirus disease (COVID-19), and were uncertain of their chances of surviving, in Milton Keynes University Hospital, Milton Keynes, Britain, January 20, 2021. Both contracted the disease and were rushed to Milton Keynes University Hospital in the same ambulance when their oxygen levels fell dangerously low. REUTERS/Toby Melville

Elizabeth Kerr, 31, and Simon O'Brien, 36, display a photo taken with their phone of their wedding, in a COVID-19 ward, days after they married in an ICU (Intensive Care Unit) when both had become critically ill with the coronavirus disease (COVID-19), and were uncertain of their chances of surviving, in Milton Keynes University Hospital, Milton Keynes, Britain, January 20, 2021. REUTERS/Toby Melville

Elizabeth Kerr, 31, and Simon O'Brien, 36, speak with nurse Sonia Carpenter in a COVID-19 ward, days after they married in an ICU (Intensive Care Unit) when both had become critically ill with the coronavirus disease (COVID-19), and were uncertain of their chances of surviving, in Milton Keynes University Hospital, Milton Keynes, Britain, January 20, 2021. REUTERS/Toby Melville

Elizabeth Kerr, 31, and Simon O'Brien, 36, are joined by Rapid Response Nurse, Hannah Cannon, in a COVID-19 ward, days after they married in an ICU (Intensive Care Unit) when both had become critically ill with the coronavirus disease (COVID-19), and were uncertain of their chances of surviving, in Milton Keynes University Hospital, Milton Keynes, Britain, January 20, 2021. REUTERS/Toby Melville