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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.
In the United States, hepatitis C virus (HCV) infection affects more than 2 million adults and is the leading cause of liver-related mortality. Therapies that eradicate HCV may prevent progression to cirrhosis, liver decompensation, hepatocellular carcinoma, need for liver transplant, and death. HCV eradication also appears to reduce the risk of extrahepatic diseases, including cryoglobulinemic vasculitis and cardiovascularevents. Direct-acting antivirals (DAAs), oral drugs that target multiple mechanisms of the HCV lifecycle, have been usedincombination since 2013. Because of their efficacy and safety, the use of DAAshas substantiall yimproved HCV treatment and made HCV eradication possible for most patients, including patients with HIV infection, severe renal and hepatic impairment, and history of organ transplantation. Individuals living with HCV should be treated to reduce liver-related and all-cause morbidity and mortality and to prevent HCV transmission...
