The COVID-19 epidemic (Coronavirus Disease 2019) currently raging in France is an emerging infectious disease linked to a virus of the genus coronavirus (SARS-CoV-2). Epidemiologically, acute myeloblastic leukemias (AML) are the most common of acute leukemias. The incidence of acute lymphoblastic leukemia (ALL) is 900 new cases in France in 2018, of which 57% in humans. The treatments administered to AML and ALL patients induce variable immunosuppression: neutropenia, neuropathy, deficits in humoral or cellular immunity or combinations of these deficits. Patients with AML or ALL therefore represent a population at high risk of developing a serious form in the event of infection with SARS-CoV-2. To date, no data is available in the literature to assess the impact of the COVID-19 epidemic in the population of patients with acute leukemia.

The main objective of the study is to determine the clinical and biological prognostic factors during SARS-CoV-2 infection in patients with acute leukemia.

Inclusion Criteria:

• Diagnosis of acute leukemia according to WHO criteria 2016 ≤ 5 years

• Diagnosis of a proven or probable SARS-CoV-2 infection according to the following criteria:

  1. Proven infection: positive Polymerase Chain Reaction (PCR) regardless of the radio-clinical picture (other tests made available later and having good diagnostic performance will be accepted)

  2. Probable infection: negative PCR but association of

     1. Evocative clinical signs, of recent installation: fever, respiratory signs (cough, dyspnea, chest pain), body aches, sore throat, rhinorrhea, headache, diarrhea / abdominal pain, frank asthenia, loss of taste / smell, conjunctivitis, type of frostbite AND
     2. evocative radiological signs, on CT: diffuse or diffuse aspect of frosted glass, condensations including pseudo-nodular condensations, association of frosted glass and condensation within the same lesion, nodules and micronodules, thickening of the interlobular septa) or on chest radiography: interstitial, alveolo-interstitial or alveolar syndrome, single or bilateral AND
     3. absence of differential diagnosis

Exclusion Criteria:

• None

COVID-19 infected patients with AML or ALL