@Bana
Mate, it's you who doesn't know what you're talking about. WHO took the situation a lot more seriously than you pretend it did. Here, let me jog your memory.
31 December: China informs WHO of the virus and the Wuhan case statistics; WHO was on full alert and ready to work with them same week.
Early January: All available data on the virus was shared (including the genetic sequence which was published immediately upon research), and the first travel guidance was issued by WHO. Case count was still very low at the time, so most things we know about the progression and transmission of the disease now weren't known then.
14 January: First confirmed case outside China.
21 January: WHO starts publishing regular situation reports and considers declaring the virus a health emergency of international concern (PHEIC). Total number of confirmed cases outside China at this point is
6 and the total death count worldwide is, coincidentally, also
6 (all of them in China).
Take note that the first meeting on the matter was convened when the numbers were this low.
30 January: Total number of confirmed cases outside China at this point is
89 and the total death count worldwide is
170 (all of them still in China!). WHO declares PHEIC and advises the countries to prepare for containment measures. Here, some illustrations.
At that point everything was in the hands of the governments because WHO has no authority to tell them what to do; it's their own responsibility. WHO had already received a lot of shit earlier as being "too alarmist" for claiming the 2009 H1N1 outbreak was a pandemic despite having case fatality rate on the same order as the typical seasonal flu. Perhaps rightfully so, because declaring an outbreak a pandemic is an immediate hit on global economy even if a government doesn't enact any emergency response. But this time they did everything right; it's the governments who didn't take the threat seriously.
So let us assume that if either China shared the information earlier or WHO elevated the status of the outbreak earlier (or both—it doesn't matter since the information would've come in at the same time), things would have been very different. Unfortunately, since neither statistics nor other factual information about the virus was known ahead of time, the total time advantage that other countries would have gotten out of it would be
between one and two weeks (much closer to one than two). So let's see what they did during this time.
Oh right,
most of them did fucking nothing, didn't they. Except South Korea and a couple more small countries. Did Koreans get some inside info from China and/or WHO? No, they just had a sensible government in place who assessed the available information and acted on it almost immediately like they should have. They invested a lot into it early on but ended up among the least affected countries in terms of both fatalities and economic impact, despite having a massive population density and travel flow with China. Because acting early means you lose less later.
If your country reacted to the risk of epidemic at least two weeks later than Korea, that's clearly not WHO's problem—that's your government's problem. Can't blame that on WHO, sorry.