The New Crown vaccine can be given in two doses on the same side of the arm without any effect on the action of the vaccine and without fear of any effect on the body. Clinically, it is generally recommended that the two shots be given in different arms in order to minimize the stimulation of the ipsilateral arm so as not to interfere with arm movement, but if the recipient has other conditions that require vaccination in the ipsilateral arm, this is also possible. The New Crown vaccine is administered by intramuscular injection, usually on the lateral deltoid muscle of the upper arm. Because the ingredients present in the New Crown vaccine may cause redness, swelling, and hardness at the needle hole after vaccination, it may also cause adverse reactions such as soreness in the arm. Therefore, it is generally recommended that the first dose be administered to the left arm, which is less active, so that the pain or swelling at the needle hole site after vaccination does not interfere with daily life. When it comes to the second dose of New Crown vaccine, it is usually chosen to be given on the right arm, but if the vaccine recipient requests to also be given on the left arm, it is also possible and will not have any adverse effects on the body. In addition, after the New Crown vaccination, you should stay at the vaccination site for 30 minutes and report any allergic reaction to the doctor. Take care to avoid excessive pressure on the vaccination site as much as possible to prevent the appearance of hard knots or further aggravation of existing hard knots. Pay attention to keeping the wound site clean and dry, and take a good protection when bathing to avoid infection at the vaccination site caused by water. Pay attention to a light diet and minimize the consumption of spicy and stimulating foods.