Two groups of cases and one group of controls will be included. A group of cases with
persistent respiratory and/or cardiovascular symptoms (cardiorespiratory cases), and
another group with persistent non-cardiorespiratory symptoms. For participation in the
study, people who meet the following inclusion criteria and none of the exclusion
criteria will be considered.

Inclusion Criteria:

- Age equal to or greater than 18 years;

- Documented SARS-CoV-2 infection by PCR or antigen test;

- Ability to understand the objectives of the study;

- Acceptance to participate in the study and willingness to sign the informed consent.

- Permanent residence in Buenos Aires Metropolitan Area.

Exclusion Criteria:

- Women who report being pregnant, who are in the puerperium or lactation period at
the time of the evaluation.

- People with known chronic debilitating conditions, defined as:

i. heart failure, ii. symptomatic Coronary Heart Disease, iii. Diagnosis of cancer
in the last 5 years iv. symptomatic anemia, v. chronic obstructive pulmonary disease
or greater than moderate asthma, vi. heart valve disease more than mild, vii.
cognitive impairment prior to the diagnosis of COVID-19, viii. diagnosis of
schizophrenia or depression, ix. any other condition that, at the discretion of the
treating professional or the research team, may explain or justify the
aforementioned symptoms.

- Participants who are undergoing an acute pathology or who have undergone it in the
last 4 weeks. In this case, they may be contacted again, after the period of time
considered acceptable by the treating professional or the research team to invite
them to participate.