Johnson

Johnson & Johnson is the fourth company in the United States to launch the third phase of vaccination.

In addition to Johnson & Johnson in the United States, Modern, Pfizer and Bio n Tech and AstraZeneca are testing third-stage vaccines.

In addition to the United States, the Johnson & Johnson vaccine will be tested in Argentina, Brazil, Chile, Colombia, Mexico, Peru and South Africa. The company plans to apply it to children if it proves to be safe for adults.