For foreign visitors, it is important to ensure that your passport is valid for at least six months from your date of arrival. You may require a tourist visa to enter India, so it's best to check with the Indian embassy or consulate in your home country. Additionally, it's advisable to stay updated on any travel advisories and entry restrictions for the specific destinations you plan to visit. As for vaccinations, it's recommended to consult with a healthcare professional for the latest information on required or recommended vaccinations for travel to India.