Sure, and yet mosquitoes alone infect over 700m people a year with various diseases, and rack up more than a million deaths each year. I find the Internet is surprisingly ineffective against malaria or dengue too. It’s also true that few people can or would wear a full body suit all day, every day. For god’s sake, we can’t even get everyone to wear a condom, never mind biohazard suits.

Still I respect your optimism, however unfounded it seems to me. I think the next really nasty flu will probably disabuse you of it, but I hope I’m wrong.