Dense and close, the other is. ..

RT @hatachino_ryoma : Around this time, the number of chilly and dry days has increased.

    I'm too late everyone because it is completely cold measures professional, important thing is many times # quiz ze Deo recap!
    Masks, hand washing and 3 dense avoidance are important for anti-virus measures , but "3 dense" is dense and close, what is the other?