eli5 how SARS was contained successfully on such a large scale as to prevent international infection?

Question

eli5 how SARS was contained successfully on such a large scale as to prevent international infection?

In: Biology

Answer 1

SARS was not contagious until after symptoms became apparent allowing infected people to be quarantined and traced more easily. COVID is contagious before showing symptoms and has asymptomatic carriers. I don’t even know if these words are spelled correctly but that’s the basic answer.