Although people believe that all the diseases are preventable, where as I strongly disagree that all the diseases can be preventable because new diseases needs case study and researches which takes years and patience, where as some diseases are difficult to study to get its treatment.
The diseases which are new and pandemic needs to know main source of cause and needs research to study about it. So it is not preventable till the researchers get the root cause of spreading disease. Even though people believe that over the counter medicines can be used for temporary treatment, despite of taking medicine some diseases would not go from the root till they know the main cause of spreading example, Corona virus.
While some diseases such as HIV- AIDS do not have proper treatment because of its continues changes happening in its cells, therefore it is still impossible for the scientists to research for its medicine to treat the patient. As a result it give more HIV cases per annum due to spread from one person to other through needle prick or by direct contact.
However, the country economy also plays an important role for preventing the diseases like Africa is the most common country for malaria fever due to the fact that its not a developed country and economically weak. While the countries which are developed they have less diseases and takes more efforts to eradicate it from their country. Therefore, preventing diseases also depends upon economy of countries.
As a result, I strongly believe that all diseases are not treatable and preventable, while all treatment and prevention depends upon the disease type, generation, country’s economy and its affords. 
Although  
people
 believe that all the  
diseases
 are preventable,  
where as
 I  
strongly
 disagree that all the  
diseases
 can be preventable  
because
 new  
diseases
 needs case study and researches which takes years and patience,  
where as
  some
  diseases
 are difficult to study to  
get
 its treatment.
The  
diseases
 which are new and pandemic needs to know main source of cause and needs research to study about it.  
So
 it is not preventable till the researchers  
get
 the root cause of spreading  
disease
.  
Even though
  people
 believe that over the counter medicines can be  
used
 for temporary treatment,  
despite of
 taking medicine  
some
  diseases
 would not go from the root till they know the main cause of spreading example,  
Corona virus
.
While  
some
  diseases
 such as HIV- AIDS do not have proper treatment  
because
 of its continues  
changes
 happening in its cells,  
therefore
 it is  
still
 impossible for the scientists to research for its medicine to treat the patient.  
As a result
 it  
give
 more HIV cases per annum due to spread from one person to other through needle prick or by direct contact. 
However
, the  
country
 economy  
also
 plays an  
important
 role for preventing the  
diseases
 like Africa is the most common  
country
 for malaria fever due to the fact that its not a developed  
country
 and  
economically
 weak. While the  
countries
 which  
are developed
 they have  
less
  diseases
 and takes more efforts to eradicate it from their  
country
.  
Therefore
, preventing  
diseases
  also
 depends upon economy of countries. 
As a result
, I  
strongly
 believe that all  
diseases
 are not treatable and preventable, while all treatment and prevention depends upon the  
disease
 type, generation,  
country’s
 economy and its affords.