index - n. a number that indicates changes in the level of something (such as a stock market) when it rises or falls

automatic - adj. always happening because of a rule, law, previous agreement, etc.

lock - v. to hold (someone or something) in a fixed position

nursing home - n. a place where people who are old or who are unable to take care of themselves can live and be taken care of

immunity - n. the power to keep yourself from being affected by a disease

response - n. something that is done as a reaction to something else

isolate - v. to put or keep (someone or something) in a place or situation that is separate from others

cruise - n. a journey on a boat or ship to a number of places as a vacation

quarantine - n. the situation of being kept away from others to prevent a disease from spreading

actual - adj. known to be correct or precise : not false or apparent

mask - n. a covering used over the mouth and nose to stop the spread of infection from one person to another

toy - n. something a child plays with

peak - v. the highest level or degree of something

generate - v. to produce (something) or cause (something) to be produced

absolutely - adv. completely or totally