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COVID-19 Vaccines Development: Challenges and Future Perspective

Published on: 9th June, 2025

Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) outbursts began at the end of 2019, which imposed a serious crisis on public health and the economy all over the world. To date, there is no antiviral drug available for SARS-CoV-2, and hence vaccination is the most preferred method to prevent people from getting attacked by this virus, especially for those who are at high risk. To counter coronavirus-2, there are various types of vaccines, which are being used, such as live attenuated vaccines, killed or inactivated vaccines, recombinant vaccines, mRNA vaccines, recombinant vector vaccines, and DNA vaccines. Novavax data shows that the vaccine is effective against severe diseases caused by B.1.351. The Pfizer-BioNTech and AstraZeneca vaccines show evidence of some protection against P.1. Due to the immune response, the Human body can recognize and protect itself against harmful foreign substances such as bacteria, viruses, and microorganisms. The immune system protects our body from these harmful substances by identifying them as antigens. Virus-infected cells release many chemicals such as chemokines and cytokines for the initiation of immune response. To control the pandemic situation, herd immunity is required by the immunization of a critical mass of the world population at once. In this review article, we have made an analysis of the immune response of the human body to SARS-CoV-2 infection, different types, and modes of action of SARS-CoV-2 vaccines along with the current status of vaccines.
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The Rarest Case of Acute Bulbar Palsy due to Internal Jugular Vein Thrombosis Secondary to Protein S Deficiency: Vernet Syndrome

Published on: 10th June, 2025

Dural Venous Sinus Thrombosis (DVST) is a rare although serious clinical entity that causes approximately 0.5% of all stroke cases. Head trauma with skull base fracture, aneurysm, CNS infection, thrombophilia, and vasculitis may be identified as a possible cause of DVST. Vernet’s Syndrome is characterized by a constellation of unilateral cranial nerve palsies involving the 9th, 10th, and 11th cranial nerves due to compression or narrowing of the jugular foramen. We herein present a case of 33 years old Bangladeshi worker from Malaysia who had history of severe Traumatic Brain Injury (TBI) following road traffic accident with multiple skull bone fracture and extradural hematoma 3 months back, presented with acute dysphagia, dysphonia, fever and cough for 6 days. Neurologic examination revealed deviation of uvula to the left side and features of consolidation over right upper chest. Magnetic Resonance Venography (MRV) revealed thrombosis involving right transverse sinus, sigmoid sinus extending up to right internal jugular vein. The diagnosis of vernet syndrome with aspiration pneumonia was made. Later thrombophilia screen showed protein S deficiency. He was treated with broad spectrum antibiotics and started anticoagulation with dabigatran. After 6 months of anticoagulation he recovered fully with no residual neurological deficit.
Cite this ArticleCrossMarkPublonsHarvard Library HOLLISGrowKudosResearchGateBase SearchOAI PMHAcademic MicrosoftScilitSemantic ScholarUniversite de ParisUW LibrariesSJSU King LibrarySJSU King LibraryNUS LibraryMcGillDET KGL BIBLiOTEKJCU DiscoveryUniversidad De LimaWorldCatVU on WorldCat
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