Abstract: A vaccine combination against SARS-CoV-2 includes a primer vaccine composition and a booster vaccine composition. The primer vaccine composition includes an effective amount of an Alphacoronavirus, and the primer vaccine is a live vaccine. The booster vaccine composition includes an effective amount of a Betacoronavirus, and the booster vaccine is a live vaccine.

Abstract: An adhesive-resisting skin treatment agent for PVC gloves is produced when the glove mold is soaked in a PVC or PVC polymer and a plastisol to form a film after cooling. The gloves are soaked in a polymer adhesive-resisting treatment solution primarily consisting of chitin, trioctanoin, an aqueous polyester resin and an aerosol mixed in a certain proportion. The capillary and the surface of the film on the gloves can absorb such solution and is evenly coated with a film. Thereafter, the gloves are cooled and their edges are rolled up and detached from the mold. The inner surface of the coating has a protective film and gives a soft, smooth, and comfortable feeling to the wearer's hand when such inner surface is in contact with the hand.