antigen

"The delicious smell of cookies induces me to eat one even when I'm not hungry. "

"The foreign student in my class has a different cultural background than the rest of us. "

"The scientist carefully examined the substance to determine its chemical composition. "

"Except for one or two days a year, he usually walks to work."

"My teacher asked for a response to the question, so I wrote an answer on the board. "

"The immune child didn't get sick with the flu, even though everyone else in the class did. "

"The box contains my old toys. "

"The flu virus spread quickly through the school, causing many students to miss class. "

"Just pull the trigger."

"The farmer's fields produced a bountiful harvest of tomatoes this year. "

"After getting the flu shot, my body produced antibodies to protect me from the flu virus. "

"The infection spread quickly through the classroom after one student got sick. "