What caused the big bang if there was nothing before

Gravity/Cosmic Inflation theory (It's really controversial)

Explanation:

According to my prior knowledge and previous research, the Big Bang Theory models that (apparently) the universe, 13 billion years ago, was simply a small speck jam-packed into one very small space (a singularity).

Eventually, gravity is what caused this speck to explode at a great speed (light speed to be exact) and as this happened -- matter and galaxies and clusters were 'somehow' created.

According to this same theory, our universe is still expanding. Not sure if this answer sated your knowledge, but tell me if you need more information!

this disease is :

* endemic (present in a defined area that is a village)

* a bacterial infection (treated with antibiotic)

* communicable by contact (by the hands)

manu-porterage is the most common mode of transmission, it transmits germs from one individual to another via the hands. this concerns infections of exogenous origin.

endemic disease, or endemic disease, refers to a disease that is constantly present in a given population, often tied to a specific geographic origin, as opposed to a pandemic that is not a sporadic disease.

antibiotics are molecules that have the property of killing (bactericidal) or limiting the spread (bacteriostatic) of bacteria.