COVID-19

Coronavirus disease 2019 (COVID-19), caused by the novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), is an acute respiratory disease that can lead to respiratory failure and death. Although anticipated that patients with chronic respiratory diseases would be at increased risk of SARS-CoV-2 infection and more severe presentations of COVID-19, it is striking that these diseases appear to be underrepresented in the comorbidities reported for patients with COVID-19. The first wave of COVID-19 has taught us important lessons concerning the enormous burden on the hospitals, shortage of beds, cross infections and transmissions, which we coped together. However, with the subsequent waves of COVID-19 or any other viral pandemic, to ensure that patients with respiratory illnesses receive adequate management for their diseases while minimizing their hospital visits for their own safety. Hence, we prepared an evidence-based summary to manage outpatients and inpatients suspected or diagnosed with COPD, asthma and ILD based on the experience of the first wave of COVID-19 and recommendations by expert societies and organizations.

For the primary prevention of coronavirus disease 2019 (COVID-19), there are currently four different vaccines available in the USA. These are Pfizer (messenger RNA [mRNA]), Moderna (mRNA), Novavax (recombinant protein), and Jansen/Johnson & Johnson (adenoviral vector). All individuals should get vaccinated, and the Centers for Disease Control and Prevention (CDC) has provided comprehensive guidelines on recommended doses, their frequency by age group, and vaccine types, all discussed in detail in this article. Vaccines are a critical and cost-effective tool for preventing the disease. Prior to receiving a vaccine, patients should get adequate counseling regarding any potential adverse effects post vaccination. Appropriate safety precautions must be taken for those more likely to experience adverse consequences. Healthcare professionals should be aware of the symptoms, indicators, and treatment of any adverse event post-vaccination. We have provided a comprehensive review of the different characteristics of COVID-19 vaccines available in the United States, including their effectiveness against various variants, adverse effects, and precautions necessary for healthcare professionals and the general population. This article also briefly covers COVID-19 vaccines available worldwide, specifically their mode of action and effectiveness.

Twonewantiviralmedications, ritonavir-boostednirmatrelvir (Paxlovid,
ie, nirmatrelvir-ritonavir) and molnupiravir (Lagevrio), are currently
available in theUS underemergency useauthorization. These 2 drugs
areauthorized for treatmentofpatientswithmild tomoderateCOVID19 who are not currently hospitalized but are at high risk of developingseveredisease.Nirmatrelvir-ritonavirandmolnupiravirareapproved
for use only within 5 days of onset of COVID-19 symptoms.
Nirmatrelvir-ritonavir andmolnupiravir should be considered for
patients with symptoms of COVID-19 who test positive for SARSCoV-2 and either are an older adult (aged 65 years or older) or are
aged 12 years or older with an underlying condition that increases
risk of severe outcomes of COVID-19 (such as cancer, heart disease,
diabetes, and obesity).

Abstract
Background: New treatments are needed to reduce the risk of progression of coronavirus disease 2019 (Covid-19). Molnupiravir is an oral, small-molecule antiviral prodrug that is active against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).

Methods: We conducted a phase 3, double-blind, randomized, placebo-controlled trial to evaluate the efficacy and safety of treatment with molnupiravir started within 5 days after the onset of signs or symptoms in nonhospitalized, unvaccinated adults with mild-to-moderate, laboratory-confirmed Covid-19 and at least one risk factor for severe Covid-19 illness. Participants in the trial were randomly assigned to receive 800 mg of molnupiravir or placebo twice daily for 5 days. The primary efficacy end point was the incidence hospitalization or death at day 29; the incidence of adverse events was the primary safety end point. A planned interim analysis was performed when 50% of 1550 participants (target enrollment) had been followed through day 29.

Results: A total of 1433 participants underwent randomization; 716 were assigned to receive molnupiravir and 717 to receive placebo. With the exception of an imbalance in sex, baseline characteristics were similar in the two groups. The superiority of molnupiravir was demonstrated at the interim analysis; the risk of hospitalization for any cause or death through day 29 was lower with molnupiravir (28 of 385 participants [7.3%]) than with placebo (53 of 377 [14.1%]) (difference, -6.8 percentage points; 95% confidence interval, -11.3 to -2.4; P = 0.001). In the analysis of all participants who had undergone randomization, the percentage of participants who were hospitalized or died through day 29 was lower in the molnupiravir group than in the placebo group (6.8% [48 of 709] vs. 9.7% [68 of 699]; difference, -3.0 percentage points; 95% confidence interval, -5.9 to -0.1). Results of subgroup analyses were largely consistent with these overall results; in some subgroups, such as patients with evidence of previous SARS-CoV-2 infection, those with low baseline viral load, and those with diabetes, the point estimate for the difference favored placebo. One death was reported in the molnupiravir group and 9 were reported in the placebo group through day 29. Adverse events were reported in 216 of 710 participants (30.4%) in the molnupiravir group and 231 of 701 (33.0%) in the placebo group.

Conclusions: Early treatment with molnupiravir reduced the risk of hospitalization or death in at-risk, unvaccinated adults with Covid-19. (Funded by Merck Sharp and Dohme; MOVe-OUT ClinicalTrials.gov number, NCT04575597.).