Luffy in the manga is strong, for sure. He's constantly evolving and unlocking new abilities. When compared to others, it depends on the context and the specific situation. Sometimes he might have an edge, while in other cases, his opponents could pose a significant challenge.
COVID-19 is highly novel. Its genetic makeup and the way it interacts with the human body are distinct. This novelty made it challenging to deal with initially as there was little prior knowledge or experience to draw from.
The quality of manga on Okline is a mixed bag. There are some hidden gems with amazing illustrations and well-written plots, but there are also some that could use improvement in terms of both art and story development.