Post COVID-19 sequelae are a constellation of symptoms often reported after recovering from COVID-19. There is a need to better understand the clinical spectrum and long-term course of this clinical entity. The aim of this study is to describe the clinical features and risk factors of post COVID-19 sequelae in the North Indian population. This prospective observational study was conducted at a tertiary healthcare centre in Northern India between October 2020 and February 2021. Patients aged >18 years with laboratory-confirmed COVID-19 were recruited after at least two weeks of diagnosis, and details were captured. A total of 1234 patients were recruited and followed up for a median duration of 91 days (IQR: 45-181 days). Among them, 495 (40.1%) had persistent symptoms post-discharge or recovery. In 223 (18.1%) patients, the symptoms resolved within four weeks; 150 (12.1%) patients had symptoms till 12 weeks, and 122 (9.9%) patients had symptoms beyond 12 weeks of diagnosis/symptom-onset of COVID-19. Most common symptoms included myalgia (10.9%), fatigue (5.5%), shortness of breath (6.1%), cough (2.1%), insomnia (1.4%), mood disturbances (0.48%) and anxiety (0.6%). Patients who were hospitalized were more likely to report fatigue as a feature of long COVID. Hypothyroidism (OR: 4.13, 95% CI: 2.2-7.6, p-value < 0.001) and hypoxia (SpO 2 ≤ 93%) (OR: 1.7, 95% CI: 1.1-2.4, p-value 0.012) were identified as risk factors for long COVID sequelae. In conclusion, long COVID symptoms were common (22%), and 9.9% had the post COVID-19 syndrome. Myalgias, fatigue and dyspnoea were common symptoms. Patients with hypothyroidism and hypoxia during acute illness were at higher risk of long COVID.

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Tuberculosis (TB) is a communicable disease caused by the bacillus Mycobacterium tuberculosis and is the leading cause of death by a single infectious agent overall. According to the WHO Global TB Report, India contributes to 26% of the global burden of TB. Currently, a four-drug regimen comprising Rifampicin, Isoniazid, Pyrazinamide, and Ethambutol is approved for the treatment of drug-sensitive TB. The management of cutaneous adverse drug reactions to anti-tubercular drugs is akin to a double-edged sword, with discontinuation of ATT increasing the risk of developing disseminated and drug-resistant tuberculosis, and continuation leading to persistence or exacerbation of the adverse drug reaction (ADR). The risk of developing an ADR to anti-tubercular therapy (ATT) varies from 8 to 85% in various studies [10]. The prevalence of rashes associated with ATT shows that the maculopapular rash (42.5%) is the most frequently observed type, followed by urticarial, lichenoid, DRESS, AGEP, and exfoliative dermatitis (17). The drugs associated with Cutaneous ADRs from the lowest to the highest risk are Isoniazid, Rifampicin, Pyrazinamide, Ethionamide, Cycloserine, Ethambutol, Para-aminosalicylic acid (PAS), and Streptomycin (25). We present a case and approach to the re-introduction of first-line anti-tubercular drugs after hypersensitivity with fixed-dose combinations. Keywords: Tuberculosis, Mycobacterium tuberculosis, adverse drug reaction, anti-tubercular therapy