The world faces a pandemic not previously experienced read more in modern times.The internal mechanism of SARS-Cov-2 is not well known and there are no Pharmaceutical Interventions available.To stem the spread of the virus, measures of respiratory etiquette, social distancing and hand hygiene have been recommended.Based on these measures, some coun
Aiming at the problems of small key space and weak resistance to differential attacks in existing encryption algorithms, we proposed a chaotic digital image encryption scheme based on an optimized artificial fish swarm algorithm and DNA coding.First, the key is associated with the ordinary image pixel through the MD5 hash operation, and the hash va
ImportanceDespite people with impaired immune competence due to an underlying disease or ongoing therapy, hereinafter frail patients, are (likely to be) the first to be vaccinated, they were usually excluded from clinical trials.ObjectiveTo report adverse reactions of frail patients after receipt of the third dose (booster) administered after compl