Well first thing you need is a good cache of melee weapons. Guns are great if possible but bullets are hard and dangerous to make so keep them for real needs. Crossbows can be good for hunting because arrows are much more easy to make, but farming should be a priority if possible, because they're more stable and safer.
Next up. Barricades aren't that great unless añready under siege. What you want is to have barriers easy enough to open from the inside but good enough to keep things out, remember, the priority isn't having walls to stop sngry neighbors, it's having the visibility to know when they come, the logistics to prepare ambushes and the ease of movement to get the drop on them. Barricades no matter how good they are can be turned against you by anyone with a molotov, you should not tellegraph your position and restrict yourself like that, enough pasive defense to keep things out is needed but once the perimeter is safe enough move on to other priorities.
After that comes the group and I've been testing how long I can keep this joke up but I'm realizing I'm even more autistic than I thought so I'm going to stop now.
Over half the chinese population doesn't clean their hands after peeing and over a third not even after pooping. Due to pollution most chinamen citydwellers have lungs more akin to oilfields than what actual lungs are supposed to look like, and due to malnutrition combined with the infections they get from eating weird shit their immune systems have long since been put on suicidewatch.
Add any virus infective and resilient enough and no wonder china's collapsing. As Dr Fernando Simon said over here (the ISCIII spokeperson and alert coordinator) "this virus isn't severe but it is worrying", as in most people will feel nothing but the socioeconomic disruption it can cause IS a huge issue even if the virus itself isn't.
Hell I've never met the guy personally but from the contact I know I can tell you he's been keeping a close eye on the flu since 2008 and spain's been worried about that since long before, because our epidemiologists always knew if it were to mutate in certain ways it could cause massive logistical issues even if not that severe. Which is why I lol at all the "its just a flu therefore don't worry" idiots. HEY DUMMIES, EXPERTS HAVE BEEN PARANOID ABOUT THE FLU FOR YEARS. PRECISELY BECAUSE OF WHAT THIS VIRUS IS DOING!