Humans would survive the typical ( slow zombie ) zombie apocalypse.

I will begin by congratulating you for how good a job you have just done. I will now state other arguments as well as reinforce a few previous ones.1. The first 30 minutes.You are correct. Many third world contries would have trouble here. It is largely chance or luck as to where the virus begins. I would however like to state that third world controls are not compleatly defenceless and most have a reputation for war lords, terrorist groups, militias, pirates and other evil organizations that would likely hold ground and fight due to the pure fear of their twisted leaders and the punishments following failure. However you are correct in saying that third world contries are much worse off. 2. Police Yes, again patient zeros location could be a determining factor. However I will state that many of the countries you are talking about ( Britain for example ) still provide their police departments with significant armories and require that cities have SWAT and riot control responses. While their lack of an immediate armed response would set them back a few minutes it likely wouldn't ruin their chance compleatly. 3. Modern MilitariesTrue civilians can be a problem but in places like Syria, Iran and North Korea, the government really dosent care about collateral damage. These militaries would gladly bomb their own civilians into oblivion in order to eliminate an apocalypse in their borders. Even China might be more agrees I've in its shoot first policy. I will repeat what I said about the value of the Navy as well. Having a massive naval fleet ( like China, the US and NK ) would enable the evacuation of citizens to ships where zombies cannot follow. Citizens would certainly be searched for bites and likely be forced to submit to CDC or WHO blood testing Before evacuation to a safe zone. Military checkpoints would likely be outfitted with such medical checkpoints to ensure that the threat is removed. I will also note that in World War Z ( where zombies were more than typical and don't even qualify here ) the Israeli government noticed the virus in India and built huge walls around major cities. Countries would likely do this and what typical zombie can climb a 10-20 story wall. I would be surprised if a typical zombie could climb a single story wall. This method was used successfully in the game, the Last of Us, as well. Also, when you said that modern guns won't kill zombies it confused me somewhat. A 1700s flintlock musket could kill a zombie if you scored a head shot. You could kill it with a rock if you hit it in the right spot. Headshots kill.4. CDC and WHO I will state a great success on WHO's part. They managed to push the ebola virus out of 2 countries in west Africa and they have managed to prevent any significant spread outside of the 3 main remaining countries. Sure a few people in the US were infected and a few in Scotland but it isn't spreading very fast. I will also state that WHO and CDC have a vaccine for ebola. The problem is that they have not yet managed to mass produce it. It has tested successfully in the US on people already though. I read about a woman in the news who took it and she came out cured. 5. SpaceWhile I will note that in modern time this is not a possibility if this outbreak were to occur in the future slightly, it is the current accepted belief of NASA and most other space agencies that Mars colonization will be occurring in 2025 with the landing of the first humans into their living areas. This project has begun now. These people are expected to begin travel to their living quarters there ( which are designed to be self sustaining due to the planned plant life installation and water drilling in the poles) . They are expected to launch years prior to 2025 so if this occurs a few years in the future a small population may escape. It's not much but it is something.6. The doomsday bunkersLuckily these leaders do not enter the bunkers alone. Most have protocol in place that ensures several special operations soldiers go in with them. So years later when the food runs out ( and the zombies are 95 percent decomposed due to all the time they had to rot ) Secret Service or Spetznaz should have no problem scavenging. Especially since the zombies would have long since abandoned the cities due to the lack of food. The zombies would have wandered out to the forest looking for wildlife to eat. 7. Nuclear Bombs You are right seems like a bad idea. But when countries are compleatly over run and half way across the globe it won't really effect you negatively if you fire the nuclear missiles. Imagine that the Western Hemisphere falls to zombies but Russia is still intact. Russia fields an arsenal of at least 8000 nukes. They could destroy that entire half of the planet with little to no harm coming to themselves. It's a worst case scenario decision but one nations would likely make.8. North Korea The North Koreans field a rather heavy force on the Chinese border as well as some decently sizable walls. They built that there to prevent anyone from sneaking in or out. They don't want some American with a camera releasing the truth due to poor border security. They quite literally designed their borders to be nearly impossible to cross. Very few people have ever escaped the regime. And those were people who were smart enough to be stealthy and hide constantly on their way out. Some dumb zombie who smells destibctly of rotting corpse and dosent know to move quietly would be easily spotted and shot opon approach. The North Koreans would likely add fortifications to the Chinese border when the outbreak began anyway Givin their reputation for paranoia.9. Island nations Luckily many islands are micronations. These are not even recognized as contries due to their small size. One of these ( Sealand for instance ) very rarely sees people coming or going. Given that these have populations as low as 20 people it will be real obvious if someone tries to get in unauthorized.other small island nations are very much isolated and third world and don't maintain much contact with the outside world besides military cooperation.10. Common Knowledge. While you are right about gun restriction in some countries many countries would likely arm the public in this case in order to prevent the spread of the virus. Citizens would likely form armed militias as well. You also didn't deny the fact that guns or no guns, people will still find melee weapons, and tools that can be used for blunt or stabbing attacks to the head. Civilian survivors would likely raid police and military armouries for guns.11. Decompossure This is a big one. A zombie is a corpse reanimated only in basic movement and primitive brain function. Zombies are known to decompose like any corpse as time goes on. This means that zombies will become gradually weaker as the months pass by. After a few years ( long before the food runs out in the doomsday bunkers ) zombies brains would have decomposed into dust leaving only and empty skeleton. The skin would, over time, grow brittal and fall of followed by the muscles disintegrating into nothing. With this occurring something as simple as a decent BB gun would be capable of killing a zombie with a head shot. All we need to do is keep one man and one woman alive for 2 or 3 years and then we could start from scratch. Back to the stone age but still alive.12. Modern RoboticsThis is only a minor advantage but I will use it. Many people argue that since we sleep and they don't we are defenceless at night. ( apparently they forget that we can have day shifts and night shifts ). We do have sentry turrets, motion censor alarms, and proximity mines. We even have mobile drones that can patrol perimeters armed with a machine gun turret. No matter how hard a zombie tries it is going to hurt a sentry gun with its teeth.13.environmentWhile zombies are resistant to pain, extream cold would still cause a zombies body to fall apart due to frost bite, and even internal freezing of muscles and the brain as time goes on. Zombies don't have our advantage of internal heating due to the fact that they are dead. Their blood isn't going to help them during extream hot or cold temperature. We also have populations living on mountains or oil rigs. The's locations would prove impossible for a zombie to reach without being noticed. A zombie wouldn't last a day in Siberia or the northwest territories. extreme heat found in deserts would also harm or kill zombies due to the heightened rate of decomposition there. 14. Terrorists and extreamistsAs evil as it is it might help save us. Some movement would start up somewhere and some psychopaths would start executing everyone who so much as coughs. Some dictatorial regimes might go as far as locking up citizens who look pale. Human fear and paranoia would drive them to extream caution and sadly violence.