Dr. Clair Vandersteen, right, wafts a tube of odors under the nose of a patient, Gabriella Forgione, during tests in a hospital in Nice, southern France, Monday, Feb. 8, 2021, to help determine why she has been unable to smell or taste since she contracted COVID-19 in November 2020. A year into the coronavirus pandemic, doctors and researchers are still striving to better understand and treat the accompanying epidemic of COVID-19-related anosmia — loss of smell — draining much of the joy of life from an increasing number of sensorially frustrated longer-term sufferers like Forgione. (AP Photo/John Leicester)

Dr. Clair Vandersteen, right, assembles tubes of odors to waft under the nose of a blindfolded patient, Gabriella Forgione, during tests in a hospital in Nice, France, on Monday, Feb. 8, 2021, to help determine why she has been unable to smell or taste since she contracted COVID-19 in November 2020. A year into the coronavirus pandemic, doctors and researchers are still striving to better understand and treat the accompanying epidemic of COVID-19-related anosmia — loss of smell — draining much of the joy of life from an increasing number of sensorially frustrated longer-term sufferers like Forgione. (AP Photo/John Leicester)

The hand of Dr. Clair Vandersteen wafts a tube of odors under the nose of a blindfolded patient, Gabriella Forgione, during tests in a hospital in Nice, southern France, Monday, Feb. 8, 2021, to help determine why she has been unable to smell or taste since she contracted COVID-19 in November 2020. A year into the coronavirus pandemic, doctors and researchers are still striving to better understand and treat the accompanying epidemic of COVID-19-related anosmia — loss of smell — draining much of the joy of life from an increasing number of sensorially frustrated longer-term sufferers like Forgione. (AP Photo/John Leicester)

Evan Cesa, a patient, smells a small pot of fragrance during tests in a clinic in Nice, France, on Monday, Feb. 8, 2021, to help determine how his sense of smell and taste have been degraded since he contracted COVID-19 in September 2020. A year into the coronavirus pandemic, doctors are striving to better understand and treat patients who lose their sense of smell. (AP Photo/John Leicester)

A researcher holds one of the small pots of fragrance used during tests in a clinic in Nice, France, on Monday, Feb. 8, 2021, to help determine how patients' sense of smell and taste have been degraded since they contracted COVID-19. A year into the coronavirus pandemic, doctors are striving to better understand and treat patients who lose their sense of smell. (AP Photo/John Leicester)

Evan Cesa, 18, eats his breakfast at his home near Nice, southern France, Monday, Feb. 8, 2021, with little appetite because he has lost his sense of smell and taste since he contracted COVID-19 in September 2020. A year into the coronavirus pandemic, doctors are striving to better understand and treat patients who lose their sense of smell. (AP Photo/John Leicester)

Dr. Clair Vandersteen, left, uses a miniature camera at his hospital in Nice, France, on Monday, Feb. 8, 2021, to check inside the nasal passages of a patient, Gabriella Forgione, who says she has been unable to smell or taste since she contracted COVID-19 in November 2020. A year into the coronavirus pandemic, doctors and researchers are still striving to better understand and treat the accompanying epidemic of COVID-19-related anosmia — loss of smell — draining much of the joy of life from an increasing number of sensorially frustrated longer-term sufferers like Forgione. (AP Photo/John Leicester)

Gabriella Forgione, a 25-year-old patient, holds still as a doctor slides a miniature camera up her nose during tests in a hospital in Nice, France, on Monday, Feb. 8, 2021, to help determine why she has been unable to smell or taste since she contracted COVID-19 in November 2020. A year into the coronavirus pandemic, doctors and researchers are still striving to better understand and treat the accompanying epidemic of COVID-19-related anosmia — loss of smell — draining much of the joy of life from an increasing number of sensorially frustrated longer-term sufferers like Forgione. (AP Photo/John Leicester)

Dr. Louise-Emilie Dumas, a psychiatrist, talks with patient Gabriella Forgione during tests in a hospital in Nice, southern France, Monday, Feb. 8, 2021, to help determine why she has been unable to smell or taste since she contracted COVID-19 in November 2020. A year into the coronavirus pandemic, doctors and researchers are still striving to better understand and treat the accompanying epidemic of COVID-19-related anosmia — loss of smell — draining much of the joy of life from an increasing number of sensorially frustrated longer-term sufferers like Forgione. (AP Photo/John Leicester)