"Pfizer and BioNTech's trial included nearly 44,000 volunteers, half of whom received the vaccine. The other half received a placebo shot of salt water. Then the researchers waited to see how many in each group developed Covid-19. The companies said that out of 170 cases of Covid-19, 162 were in the placebo group, and eight were in the vaccine group. Out of 10 cases of severe Covid-19, nine had received a placebo."

How many volunteers received the vaccine?

Among the volunteers who came down with Covid-19,

what % were in the placebo group?

what % were in the vaccine group?

How many people in the placebo group did NOT come down with Covid-19?

The [Pfizer] vaccine must be stored at minus 94 degrees Fahrenheit, colder than any other vaccine in development."

Using the formula C=59(F32) , determine the temperature at which the Pfizer vaccine must be stored in degrees Celsius. (Enter answer without units.) The answer need not be rounded.

"The company [Moderna] said on Monday that its vaccine could be stored at standard refrigerator temperatures of 36 to 46 degrees Fahrenheit for up to 30 days, not seven as previously thought, which could make it easier to store than the Pfizer vaccine."

This gives a ten-degree range of temperatures in degrees Fahrenheit. The range in degrees Celsius is closest to?

"Pfizer will ship the vaccine in special boxes of 1,000 to 5,000 doses that are stuffed with dry ice and equipped with GPS-enabled sensors."

Seven of these boxes might contain a minimum of how many doses?

a maximum of how many doses?

"Pfizer and BioNTech's trial included nearly 44,000 volunteers.

The most common serious adverse event was fatigue, with 3.7 percent of volunteers reporting tiredness after they took the second dose. Two percent of volunteers reported a headache after the second dose."

Assuming thatall volunteers are included in the statistics given above, how many people reported tiredness?

how many eople reported headache?