Advantages and Drawbacks Islands have 

In comparison to people who live on mainland, people living on islands have a higher chance of survival. It is blatant that people living on islands can keep viruses out if they don't have anything coming outside of the island. They also want to hamper people from coming to them, given the fact that if they have one person with the novel virus, there are high changes of human eradication. Therefore, the only swift solution they have found in order to stop the spread of this pandemic, is total quarantine of islands. To be exact, nobody leaves or enters the island until we find a cure.

Furthermore, islanders are more vulnerable because they don't have a great health system. We may see this in Haiti. For instance, when the renowned Cholera disease became ubiquitous  throughout the Haiti Islands, all the health system got affected and mayhem together with panic broke loose into the population. The unfortunate thing is that CDC only squinted at it and nobody tried helping them, expect for the UN. They had taken water samples to later find out that the virus is spreading by water. It had such a large effect on the country because of the poor sanitation, poverty and not enough drinking water.

Now we should return to the present day. Even though there is no active case of coronavirus in Haiti, there is a lot of fear for the novel virus. If one person had gotten infected, all the population would have been put at risk. You would be stunned to find that there is almost no respiratory device on Haiti and other small islands. 

Given the above mentions, I think that a plethora of small islands are left behind and therefore have to find other ways to protect themselves.