Johnson & Johnson's COVID-19 vaccine was embroiled in controversy after Catholic bishops criticized it.
In the US, a group of them said that applying this dose is a moral hazard.
What do they mean?
On the other hand, some individuals fear to get vaccines because they do not know its components.
Dr. Irene Bosch, molecular biologist, helps to answer what the injections contain, how they are developed and if the ethical concerns of some sectors are founded.