Complete the paragraph given below-
The immune system has two ways to defend the body against pathogens like the coronavirus — by producing antibodies that disable an infectious agent and by manufacturing T cells that have a long memory of such agents. _______ However, a robust T cell response can prevent the infection from recurring.
1
Early research has suggested that antibodies fade away within months of contracting the coronavirus.
2
The vaccine has shown encouraging results in early trials.
3
Large-scale trials are required to ascertain if the vaccine actually protects against the pathogen.
4
But we do not know how protective the memory in the T cells, induced by the vaccine, will be against the coronavirus.
5
The Oxford-AstraZeneca vaccine is designed to trigger both kinds of reactions.