It is necessary to pray for the health of your loved ones, and your relatives, friends, colleagues, relatives. Read prayers for health every day. Go to church, write little notes.
People are more likely to get flu and SARS in the cold season, and there are two reasons for this. Firstly, in the cold there is a reflex vasoconstriction in the nasal cavity (in order to exhale less warm air and not overcool the body as a whole), and because of this, local immunity works worse: it is easier for the virus to penetrate the mucous membrane and start multiplying there, immune cells later reach it. Secondly, people spend more time indoors and exchange viruses with each other.
Preventive measures - ventilate the premises; wash our hands, since we often do not inhale viruses, but put them on our mucous membranes, touching our nose or eyes; you can get a flu shot, with a guarantee it will not prevent the disease (since the influenza virus evolves too quickly), but it will still reduce the likelihood of both illness and complications. As much as possible, avoiding the flu and colds on your feet, and lying down at home - this is also more beneficial for recovery, and reduces the number of man-hours lost to society at the expense of all those whom you would otherwise infect.