Members of the medical personnel wearing full protective suits are seen as they treat a patient infected with the coronavirus disease (COVID-19), in the intensive care unit at Maastricht UMC+ Hospital in Maastricht, Netherlands, November 10, 2020.

A medical worker wearing personal protective equipment (PPE) takes care of a patient at the intensive care unit (ICU) of the George Papanikolaou General Hospital, during the coronavirus disease (COVID-19) pandemic in

Medical staff members work in the Intensive Care Unit (ICU) where patients suffering from the coronavirus disease (COVID-19) are treated at Ambroise Pare clinic in Neuilly-sur-Seine, near Paris, France, November 12, 2020.

Medical staff members work in the Intensive Care Unit (ICU) where patients suffering from the coronavirus disease (COVID-19) are treated at Ambroise Pare clinic in Neuilly-sur-Seine, near Paris, France, November 12, 2020.

A patient waits to be treated in the emergency room of the Maggiore di Lodi hospital, as a second wave of the coronavirus disease (COVID-19) hits the country, in Lodi, Italy, November 13, 2020.

A sign that reads "COVID medicine unit" is seen at the Intensive Care Unit (ICU) where patients suffering from the coronavirus disease (COVID-19) are treated at Ambroise Pare clinic in Neuilly-sur-Seine, near Paris, France, November 12, 2020.

A nurse treats a patient suffering from the coronavirus disease at the COVID-19 isolation ward of DRK Kliniken Berlin Mitte hospital in Berlin, Germany, November 11, 2020.

A medical worker is seen, as patients suffering with the coronavirus disease (COVID-19) are treated in the emergency room of the Maggiore di Lodi hospital, in Lodi, Italy, November 13, 2020.

A patient suffering with the coronavirus disease (COVID-19) is treated in the intensive care unit of the Maggiore di Lodi hospital, in Lodi, Italy, November 13, 2020.

A medical staff member wearing a protective suit and gloves works in the Intensive Care Unit (ICU) where patients suffering from the coronavirus disease (COVID-19) are treated at the hospital in Vannes, France, November 12, 2020.

Medical staff members work in the Intensive Care Unit (ICU) where patients suffering from the coronavirus disease (COVID-19) are treated at Ambroise Pare clinic in Neuilly-sur-Seine, near Paris, France, November 12, 2020.

Nurses have their daily shift handover briefing on the medical treatment for patients suffering from the coronavirus disease at the COVID-19 isolation ward of DRK Kliniken Berlin Mitte hospital in Berlin, Germany, November 11, 2020.

A medical worker wearing personal protective equipment (PPE) takes care of a patient at the intensive care unit (ICU) of the George Papanikolaou General Hospital, during the coronavirus disease (COVID-19) pandemic in Thessaloniki, Greece, November 11, 2020.

A physiotherapist holds the hand of a patient suffering from the coronavirus disease (COVID-19) in the Intensive Care Unit (ICU) at the hospital in Vannes during the outbreak of the coronavirus disease in France, November 12, 2020.

A medical staff member works in the Intensive Care Unit (ICU) where patients suffering from the coronavirus disease (COVID-19) are treated at Ambroise Pare clinic in Neuilly-sur-Seine, near Paris, France, November 12, 2020.

A patient suffering with the coronavirus disease (COVID-19) is treated in the intensive care unit of the Maggiore di Lodi hospital, in Lodi, Italy, November 13, 2020.

Doctor Katharina Franz (R) and paramedic Andreas Hankel (L) of rescue helicopter "Christoph Giessen" revive a patient during preparations of his transport in a special isolation chamber "IsoArk" for highly infectious COVID-19 patients from a clinic in Hanau, Germany, April 16, 2020.

A nurse treats a patient suffering from the coronavirus disease at the COVID-19 isolation ward of DRK Kliniken Berlin Mitte hospital in Berlin, Germany, November 11, 2020.

A patient suffering with the coronavirus disease (COVID-19) is treated in the intensive care unit of the Maggiore di Lodi hospital, in Lodi, Italy, November 13, 2020.

Members of the medical personnel wearing full protective suits are seen as they treat a patient infected with the coronavirus disease (COVID-19), in the intensive care unit at Maastricht UMC+ Hospital in Maastricht, Netherlands, November 10, 2020.

A patient suffering from the coronavirus disease (COVID-19) lies on his front in the Intensive Care Unit (ICU) where patients suffering from the coronavirus disease (COVID-19) are treated at Ambroise Pare clinic in Neuilly-sur-Seine, near Paris, France, November 12, 2020.

A medical crew from Strasbourg's university hospital carries a patient suffering from the coronavirus disease (COVID-19) on a stretcher after his transfer by a helicopter of the French civil security (Securite Civile) from Lyon to Strasbourg, France, November 12, 2020. Picture taken November 12, 2020.

A patient suffering from the coronavirus disease (COVID-19) is treated in the Intensive Care Unit (ICU) at the hospital in Vannes during the outbreak of the coronavirus disease in France, November 12, 2020.

A member of the medical personnel wearing a full protective suit is seen as she treats a patient infected with the coronavirus disease (COVID-19), in the intensive care unit at Maastricht UMC+ Hospital in Maastricht, Netherlands, November 10, 2020.

Medical workers wearing personal protective equipment (PPE) take care of a patient at the intensive care unit (ICU) of the George Papanikolaou General Hospital, during the coronavirus disease (COVID-19) pandemic in Thessaloniki, Greece, November 11, 2020. Picture taken November 11, 2020.

A medical staff member wearing protective mask and suit works in the Intensive Care Unit (ICU) where patients suffering from the coronavirus disease (COVID-19) are treated at the hospital in Vannes, France, November 12, 2020.

Medical staff members work in the Intensive Care Unit (ICU) where patients suffering from the coronavirus disease (COVID-19) are treated at Ambroise Pare clinic in Neuilly-sur-Seine, near Paris, France, November 12, 2020.

A doctor at Strasbourg's university hospital is seen putting protective clothes while attending a training for new staff to reinforce ICU regular crews who face a second wave of patients suffering from the coronavirus disease (COVID-19) in Strasbourg, France, November 13, 2020.

A medical staff member works in the Intensive Care Unit (ICU) where patients suffering from the coronavirus disease (COVID-19) are treated at Ambroise Pare clinic in Neuilly-sur-Seine, near Paris, France, November 12, 2020.

A patient suffering with the coronavirus disease (COVID-19) is treated in the intensive care unit of the Maggiore di Lodi hospital, in Lodi, Italy, November 13, 2020.

A patient suffering from the coronavirus disease (COVID-19) is treated by a physiotherapist in the Intensive Care Unit (ICU) at the hospital in Vannes during the outbreak of the coronavirus disease in France, November 12, 2020.

Members of the medical personnel prepare in the emergency room of the Maggiore di Lodi hospital, where patients suffering from the coronavirus disease (COVID-19) wait to be treated, as a second wave of the coronavirus disease (COVID-19) hits the country, in Lodi, Italy, November 13, 2020.

Medical staff members work in the Intensive Care Unit (ICU) where patients suffering from the coronavirus disease (COVID-19) are treated at the hospital in Vannes, France, November 12, 2020.