is unclear. moderna we know has submitted an application with the fda this month. meanwhile, j&j still has not, but we know that they are engaged with the agency. lindsey. >> kathy park, thank you. let's bring in msnbc medical contributor dr. black stock. good morning and good to see you. what do you make of the decision sheer by the panel to only recommend boosters for older and more vulnerable americans? >> i understand how the public could be confused. i believe president biden spoke prematurely. the decision made friday by the fda viedsry committee makes sense. it follows the signs that we have available thus far that older people are more likely to experience wang immunity to the vaccine and are more like loy to develop severe disease. also people at high risk. those include high risk disease or high risk occupations like health care workers.