If you're planning on shaving a bunch of other people, follow the chart. If you're just going to shave yourself, load the new razor up with a copious amount of bathroom disinfectant (without bleach) like Scrubbing Bubbles and let it sit for 10-15 minutes.
If I was concerned at all about contracting an exotic disease from an antique razor that's been high and dry for years, I'd just buy new.
If I was concerned at all about contracting an exotic disease from an antique razor that's been high and dry for years, I'd just buy new.