Buzz...

June Tatelman had recently received her second dose of Pfizer's Covid-19 vaccine. Maybe soon she could play with her grandchildren etc...

She ran into her family physician -- who killed her buzz very quickly.

To treat inflamed blood vessels in her lungs, Tatelman, 73, takes a drug that suppresses her immune system. Medical studies suggest the vaccine might not work well for some.

He asked her to get a blood test to see if the vaccine had worked -- if she had antibodies against the virus.

She did the test and had no detectable antibodies against Covid-19.

There's very little data to help answer these questions. Tens of millions of other Americans are also taking immunosuppressive drugs that might weaken the effect of the Covid-19 vaccine, and they find themselves in uncharted territory,