Coronavirus: Can the vaccinated spread the virus?

There is this Tweet that made the rounds from a Ben Wakana who is the deputy director of strategic communications and engagement for the White House COVID-19 Reponse Team.

VACCINATED PEOPLE DO NOT TRANSMIT THE VIRUS AT THE SAME RATE AS UNVACCINATED PEOPLE AND IF YOU FAIL TO INCLUDE THAT CONTEXT YOU'RE DOING IT WRONG. https://t.co/gBkDbJ21xX

— Ben Wakana (@benwakana46) July 30, 2021

"Vaccinated People do not transmit the virus at the same rate as unvaccinated people and if you fail to include that context you're doing it wrong."

This might hold up as a true fact, but how true is it? Will this tweet end up splitting hairs?

Here's this story from the Baltimore Sun (Aug 3):

Five days earlier, I had gone to a house party in Montgomery County. There were 15 adults there, all of us fully vaccinated . . . Then, I started to hear that a few other people who had been at the party were getting sick. Then a few more. At this point, 11 of the 15 have tested positive for COVID.

Here's a situation where a single person might have been infected by a non-vaccinated person, but it would seem apparent that this person then infected 10 other individuals.

And here's the original story that set off Ben Wakana. 

Boston Gold (July 30): 

Scientists studying the massive COVID outbreak in Provincetown made a startling discovery that fueled the US Centers for Disease Control and Prevention’s new masking policy this week: that vaccinated people who become infected can carry as much of the virus as unvaccinated patients.

. . . According to the CDC’s report, 469 COVID-19 cases were identified among Massachusetts residents who had traveled to Provincetown between July 3 and July 17, including 346 fully vaccinated people. About 274 of the vaccinated people with so-called breakthrough infections showed symptoms, most commonly cough, headache, sore throat, muscle pain, and fever.

There is no way that these 346 people were infected by non-vaccinated people. Many of these vaccinated people were probably hanging out as family or close-knit friend units and got infected by sharing rooms.