Yes, it is possible for someone to carry a virus without showing any symptoms, a condition known as being asymptomatic. In the case of illnesses like COVID-19, asymptomatic carriers can unknowingly spread the virus to others, including family members such as your daughters or grandson. This underscores the importance of following public health guidelines such as wearing masks, maintaining physical distance, and practicing good hygiene, even when around seemingly healthy individuals. These precautions help minimize the risk of transmission, especially to those who may be more vulnerable to severe illness. If you suspect exposure or potential transmission, it's advisable to adhere to local health recommendations, consider testing if appropriate, and take measures to safeguard yourself and your loved ones.