The US Centers for Disease Control and Prevention (CDC) has released a new study showing that the effectiveness of the Novel Coronavirus vaccine in the US has dropped from 91% to 66% as the Novel Coronavirus delta variant has taken hold. 

With the continuous fermentation of the epidemic, mutant strains such as Beta strain, Delta strain and gamma strain appeared successively, which significantly reduced the efficiency of the existing vaccines, no matter domestic inactivated virus vaccine, adenovirus vaccine or mRNA vaccine of Pfizer and Mortana. In search of effective ways to combat the epidemic, scientists are constantly exploring new breakthroughs .

Wine, peanuts, pistachios and dark-skinned berries may help fight COVID-19, according to an article in Russia's Izvestia newspaper. The scientists came to their conclusion after analysing the effects of the antioxidant resveratrol on an enzyme called ACE2 in lung tissue and the digestive system. At present this idea has only been tested in animal studies, but experts believe that resveratrol does increase ACE2 levels and thus resist novel coronavirus.

ACE2 is a protein essential for the body's vital activities. It is found in lung tissue, heart, kidney, brain and testicles and plays a role in regulating cardiovascular and kidney function and fertility. According to the conclusion of endocrinology experts at Tongren Hospital in Beijing, China, novel Coronavirus can disrupt ACE2 activity in various organs. When ACE2 is no longer working, it leads to an increase in Ang ⅱ peptide, which increases inflammation and can concontract blood vessels and damage the endothelium, said Romanzinovkin, a senior researcher at Moscow State University's Molecular Biology Laboratory.

Resveratrol is a small natural polyphenol molecule that acts as an antioxidant in the human body. This substance is found in a variety of plants including grape, liao, peanut and veratrol, and is highest in knotweed, red grape skin, mulberries, blueberries and blackberries. Resveratrol is a plant antitoxin produced by plants in response to adverse effects such as excessive ultraviolet radiation, extreme conditions during climate change, diseases and parasites.

Resveratrol has been studied as a treatment for a host of diseases, including inflammation, atherosclerosis, cancer prevention, longevity and many other effects. Resveratrol's potential anti-coronavirus effects are reflected in its effects on immunity, as the antioxidant has a suppressive effect on cells of the immune system. Cytokines can trigger "cytokine storms" that often lead to death in COVID-19 patients, and resveratrol has anti-inflammatory effects that reduce cytokine levels.

Given that ARDS is caused by an overactive immune system, it's entirely possible that resveratrol could play a positive role in the development of this complication. Studies in mice suggest that large amounts of ACE2 may reduce the discomfort associated with ACUTE respiratory distress syndrome (ARDS) that accompanies COVID-19. Experts generally agree that resveratrol reduces the discomfort of novel coronavirus disease. While it is not possible to say exactly how much resveratrol-rich food intake affects the body's ability to resist the novel Coronavirus, it is clear that appropriate consumption of resveratrol-containing foods can be beneficial.