We believe that vaccination is just a way to eliminate or strongly stop the COVID-19. In this regard, there are several vaccines with different efficacy and side effects. It is urgently required to have some efficient vaccines for the prevention and control of SARS-CoV-2. In this review, international databases were considered for searching relevant articles from 1 January 2020 to 1 May 2021. Keywords were COVID-19, novel coronavirus, 2019- nCoV, coronavirus disease 2019, vaccine, Sputnik V, Gamaleya, Gam-COVID-Vac, Sinopharm, BBIBP-CorV, AstraZeneca, Vaxzevria, Oxford, ChAdOx1 nCoV-19 and AZD1222. Three Sputnik V, Sinopharm and AstraZeneca vaccines are useful to gain herd immunity. Enough intervals (at least three weeks/21 days) must be considered for sufficient neutralizing antibody titers. What is important is that the vaccination should be accelerated with each of the aforementioned three vaccines to achieve herd immunity in a shorter period of time because all three vaccines provide 100% prevention of severe COVID-19.
Coronavirus disease 2019 (COVID-19) was reported in Wuhan, in late December 2019 and was became a pandemic health problem worldwide. In this review, the current evidence related to the ocular transmission of SARS-CoV-2 and its common manifestations was studied. According to this review, 7% to 69.4% of patients had at least an ocular symptom following COVID-19. Ocular symptom are bilateral or unilateral conjunctivitis, increased secretion, eye itching and foreign body sensation, epiphora, dry eye, conjunctival congestion, eye pink, conjunctival hyperemia, and chemosis. SARS-CoV-2 particles were found in tears and conjunctiva. Therefore, the transmission of COVID-19 by conjunctiva is possible. Then, it is essential to wear eye shield to protect against developing ocular involvement by COVID-19 because personal glasses and contact lenses cannot protect from COVID-19.
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