Background The novel coronavirus has embarked on a global pandemic and severe mortality with limited access for its treatments and medications. For the lack of time, research, and enough efficacy, most vaccines are underdeveloped or unreachable to society. However, many recent studies suggest various alternative, complementary remedies for COVID-19, which are functional foods. This review provides an overview of how functional foods can play a great role through modulating the host immune system, generating antiviral activities, and synthesizing biologically active agents effective against the coronavirus. Main body This review article summarizes the natural defense mechanisms in tackling SARS-CoV-2 alongside conventional therapeutic options and their corresponding harmful side effects. By analyzing bioactive components of functional foods, we have outlined its different contributions to human health and its potential immunomodulatory and antiviral properties that can enhance resistivity to viral infection. Moreover, we have provided a myriad of accessible and cost-effective functional foods that could be further investigated to target specific key symptoms of COVID-19 infections. Finally, we have found various functional foods with potent bioactive compounds that can inhibit or prevent COVID-19 infections and disease progression. Short conclusion Numerous functional foods can help the body fight COVID-19 through several mechanisms such as the reduced release of pro-inflammatory cytokines, reduced expression of ACE2 receptors in cells, and inhibiting essential enzymes in SARS-CoV-2.

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Hereby, we, the members, consciously assure that the following is fulfilled for the manuscript, "Flood Prediction Using Machine Learning Models".1. The contents of this paper are unique work of the writers' and it has not been published before.2. Only the authors' own research and analysis is presented in the work with utmost accuracy.3. Contributions by the co-authors and co-researchers are rightly acknowledged in the study.4. All sources are appropriately mentioned (correct citation). Text that is literally copied must be identified as such by using quote marks and providing suitable reference.5. The authors actively participated and put in effort leading to the article and any public responsibility related to it's content will be accepted.Violations of the Ethical Statement standards may have serious repercussions. We agree with the preceding declarations and certify that this submission adheres to BRAC University's rules.

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