The entire world has been suffering from the coronavirus disease 2019 (COVID‐19) pandemic since March 11, 2020. More than a year later, the COVID‐19 vaccination brought hope to control this viral pandemic. Here, we review the unknowns of the COVID‐19 vaccination, such as its longevity, asymptomatic spread, long‐term side effects, and its efficacy on immunocompromised patients. In addition, we discuss challenges associated with the COVID‐19 vaccination, such as the global access and distribution of vaccine doses, adherence to hygiene guidelines after vaccination, the emergence of novel severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) variants, and vaccine resistance. Despite all these challenges and the fact that the end of the COVID‐19 pandemic is still unclear, vaccines have brought great hope for the world, with several reports indicating a significant decline in the risk of COVID19‐related infection and hospitalizations.

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Metacognition is among the current controversial neuropsychological topics which had its influence on cognition in ill and healthy individuals. Many cognitive failures that (TBI) patients endure are not tackled in standardized protocols of cognitive rehabilitation efforts. One of the debilitating features of (TBI) is the lack of self-awareness of the disease. Metacognitive training can help in diminishing rehabilitation resisting obstacles. Not many studies to our knowledge have been done on meta-cognitive rehabilitation efforts in the case of (TBI) patients. In this review, electronic database is searched in strict inclusion exclusion criteria, eight studies have been included in a descriptive analysis. This might determine the power of evidence on the effect of metacognitive skills and strategy training on cognitive function in (TBI) patients. Studies recruited ranged from addressing executive function, social skills, to general cognitive competences. All of the studies proved the significance of metacognitive interventions in altering cognitive rehabilitation outcome but more attention should be given to the generalization of learned skills to daily life.

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