The corona virus disease COVID-19 has changed the world. To combat the pandemic, researchers and companies around the world are working to develop vaccines and medicines. Chitosan also has potential in the area of vaccine development and functionalization of protective equipment such as respirators. We have prepared summaries of recent publications on chitosan as an aid in the fight against corona.

Hepatocellular carcinoma is a solid tumor that exhibits severe angiogenesis, cell cycle dysregulation, and evasion of apoptosis. Late diagnosis in a large proportion of patients is making the carcinomas inoperable, and various chemotherapeutic agents are used. Due to the numerous side effects of known chemotherapeutic agents, intensive research is performed on the use of natural products and their synthetic analogues. The authors of the presented study investigated the effect of carboxymethyl chitosan oligosaccharides on the growth of hepatocellular tumors in mice.